Skip to content

File extension p7m is an encrypted type message of files.


What is the .P7M format

The P7M File is an encrypted message.

Mime: application/pkcs7-mime
Mime: application/x-pkcs7-mime

PKCS #7 MIME Message (RFC 2311 MIME)

S/MIME (Secure/Multipurpose Internet Mail Extensions) provides a consistent way to send and receive secure MIME data through files. Based on the popular Internet MIME standard, S/MIME provides the following cryptographic security services for electronic messaging applications: authentication, message integrity and non-repudiation of origin (using digital signatures) and privacy and data security (using encryption).

How to open p7m files

You can use the following free viewers online, software and programs to open the files.

For Windows:

  • p7m viewer
  • Cryptigo S/MIME Plugin,
  • Cryptigo p7m Viewer for Eudora

For MAC:

  • Apple Keychain access

This file is usually part of a file attachment in a mail message. You will need the private jey that matches the created public key of the original message.

File type: BlackIce PC Protection evidence log file definition and 9 other file types and linked programs information.


How to open ENC File

It is used by following file type(s): and software:


BlackIce PC Protection evidence log file

ENC file is associated with the BlackIce PC Protection. BlackIce PC Protection is used to protect computers against attacks from Internet. BlackIce PC Protection was developed by Internet Security Systems. It was acquired by IBM in 2006 and developing of BlackIce PC protection was stopped.

A BlackIce .enc file contains encoded logs with records of detected attacks on the computer.

Open the files with:


Cabal Online game data file

These enc files are associated with the Cabal Online on-line massive RPG (MMORPG) computer game.

An .enc file from Cabal Online contains various game data such as graphics, models, textures, sounds, music, maps etc.

Program to view the files

  • Cabal Online (Microsoft Windows)


CopySafe PDF encrypted file

These files are associated with the CopySafe PDF Protector application. CopySafe PDF Protector is used to encode and protect PDF documents against unauthorized viewing and editing.

CopySafe .enc file contains encoded PDF document, which can be viewed using CopySafe PDF Viewer


  • CopySafe PDF Protector (Microsoft Windows)
  • CopySafe PDF Reader (Microsoft Windows)


Electronic navigation chart file

It is also used for Electronic Navigation Chart (ENC) file format developed by National Oceanic and Atmospheric Administration (NOAA) and Office of Coast Survey (OCS).

An Electronic navigation chart file contains vector database of chart features. These .enc files are used are used by marine transport and coastal management ECDIS (Electronic Chart and Display Information Systems) applications.


  • EarthNC Online Viewer (multiplatform software)
  • Easy View (Microsoft Windows)
  • Fugawi View (Microsoft Windows)
  • NOAA Electronic Navigational Charts to GIS (multiplatform software)

Encore musical notation file format

The ENC file suffix represents musical score document written in Encore. Encore is a musical score application used to compose music. It can import and export standard Music XML files to integrate with other musical notation programs. The software also supports high-quality prints using PostScript and TrueType technologies.


  • ENCORE! (multiplatform software)


kmttg video profile file

These enc files are also associated with the kmttg application. kmttg is used to decrypt, transport and convert recorded video from Tivo DVR recorders to computer.

A kmttg .enc files contains profile settings such as video codec, resolution, audio codec, bit rate etc. used to encode final video.


  • kmttg (multiplatform software)


Media Safe (Nokia Symbian)

The ENC file extension is associated with the Media Safe application. Media Safe is used to encrypt media data stored on smart mobile phones that use Symbian operating system.


Uuencode encoded file

It is also sometimes associated with Uuencoding encoding file format that is used by various applications such as Lotus 1-2-3, Adobe Flash etc. to protect projects against unauthorized access. Uuencoding was also popular for sending binary files by e-mail. base64 encoding replaced Uunecoding.

Uuencoding encoding format was originally used by encryption software for Unix operating system named uuencode (Unix-to-Unix encoding). Uuencoding format is a form of binary-to-text encoding. To decode the uuncoded file back to original binary format is used program named uudecode.

Applications to open the files:

  •  IZArc (Microsoft Windows)
  • StuffIt Deluxe (Microsoft Windows)
  • StuffIt Deluxe for Mac (Apple OS X)
  • ZipZag (Microsoft Windows)

Yahoo! Instant Messenger file

It is a Yahoo! Messenger file. Yahoo! Messenger is multi-platform instant messaging client that is able to send text messages as well as establish voice calls.

The Yahoo! .enc file is only for internal purpose of Yahoo! Instant Messenger and contains some resource data.

Software to open files

  • Yahoo! Instant Messenger (multiplatform software)


How to Get Help with File Explorer in Windows 10

The File Explorer Windows browser receives much less praise than it deserves. It is one of the most complete and powerful windows operating system tools and it improves significantly with each version. If you have used other file managers in other operating systems, you can not deny that however beautiful they look, they do not let you do everything Windows lets you do.

In Windows 10 several new things were included that make the browser even better and that few users take advantage of. Today we are going to teach you several of them, we are going to give you some tips to squeeze the file explorer to the fullest and we will also tell you how you can change your appearance, add extra things or remove those that you do not like.


file explorer


Add tabs to File Explorer Windows

This is something that some Linux users are already accustomed to, and to which anyone who has used a web browser in their life will find it super practical. There is an application called Clover that adds tabs to Windows Explorer.

It works from Windows XP to Windows 10. It's free, and not only lets you open several folders within the same window thanks to the use of tabs very similar to Chrome or Firefox, but it lets you add favorites to a bar, or change The theme is compatible with Google Chrome.

You can use the keyboard shortcut CTRL + T to open new tabs, with CTRL + W you close a tab, and with CTRL + Tab you switch between the different tabs. If you are someone who prefers to use your keyboard than the mouse, you will save a good amount of time between tasks.


Restart the File Explorer Windows in case of emergency

While we said that Windows File Explorer is very good, we did not say it was perfect. If you know all the users of this operating system is the curse of crashes and applications that stop responding, the Explorer is one of the most suffering from this evil.

At Microsoft they know it, and that's why from Windows 8 they added a button dedicated to restarting Windows Explorer from the Task Manager. You just have to right click on the start button and select the Administrator, or use the keyboard shortcut CTRL + SHIFT + ESC.

Task Manager
From there in the Processes tab, look for the Windows File Explorer in the list of active applications, select it and then click on the "Restart" button that appears below and to the right.

See advanced audio and video information in the file explorer

With the MediaTab add-on you can get detailed information of multimedia files by simply right clicking on them. You can know things like codec, bitrate, resolution, code options, metadata and more without having to open a separate application.

Hide frequent folders from quick access in file explorer

In Windows 10 a new feature was added to the Windows file Explorer section called "Quick Access". Every time the system detects that you open a lot of certain folders, it automatically adds them to that list. This sometimes generates very long and somewhat annoying lists. It may be that one day I opened a folder a lot, but it does not mean that I want a direct access to it forever.

Luckily, we can turn this off so that it looks more like the favorites that appeared in the browser in Windows 8. To do this we have to open the folder options of the browser:

browser folders
Now in the Privacy options in the General tab, uncheck the boxes "Show recently used files or folders in Quick Access".

Folder options
You can also take advantage of changing the behavior of the browser when you first start it. By default it opens in Quick Access, but you can choose to start in This computer, or equivalent to the old "My Computer".


Change the type of view quickly

You probably know that by right clicking inside any Windows file Explorer folder you open a contextual menu to change how the icons look. You know, small, medium, large, very large, mosaics, content or details.

What you may not know is that you do not have to do a single click to navigate between all those views, all you have to do is press the CTRL key and move the mouse wheel. The GIF above shows it clearly.


Rename multiple files at once

Renaming files in file Explorer is easier than some believe, if you know how to use the tool well, you will save many, many clicks. If for example you want to change the name of several files at the same time for different things, you just have to right click on it and choose "Rename" in the contextual menu that appears.

An even simpler way is to make a soft left click on the file and wait a second for the name to be editable. When you have changed the name you do not have to press Enter, you do not have to make another click, simply press the TAB key to pass the next file and rename it directly.

You can also select multiple files at the same time, right click, select the option "Rename" and choose a name for them, Windows Explorer will add a number in parentheses automatically to each element to differentiate them.


Add the option to send files to other devices

One of the most useful applications I have found in this life is called Pushbullet. This simple tool allows us to send files, notes, links, and images between different devices.

If you download the Windows version, it will be integrated with Windows Explorer so that each time you right click on any file, you will have the option to send it to your tablet, smartphone, another computer, another browser, a friend, etc. and this will receive it as a push notification. It can be incredibly convenient.


Do advanced searches

If you usually manage a lot of documents on your computer and there are so many that you always have trouble finding things the first time, you probably need more help to use the search function in Windows Explorer.

For example, something simple is that from the search drawer you can search for files according to the size and date of modification, but you may not know the different operators to do advanced searches that can be used in it.

Search Results On This Equipment
For example, the "AND" operator is used to search for files that contain two specific words. "Presentation AND May" will search for files containing the words "Presentation" and "May" in the name no matter where they are in the file.

The "NOT" operator does the opposite, "NOT Mayo Presentation" will search for files that contain the word "Presentation" and exclude all those that also contain the word "May". The "OR" operator will search for files that contain any of the two search terms, together or separately.


Delete search history

If for any reason you want to delete the search history of the Windows File Explorer, you can do it. Normally the browser remembers all the searches you have done before and when you start writing something in the drawer suggests past searches, this can be very useful and serve to save time, but if you share the computer with someone you could have your reasons to want delete it


Search File Explorer

To do this open the File Explorer, click inside the search box and then in "Search" under the "Search tools" tab.

Then click on "Recent searches" and there will appear the option to erase the history.

Make Windows 10 File Explorer look more like Windows 7

If you do not like the so-called "ribbon" menu that first appeared in Windows 8 and adds a lot of additional options to the file browser at the top, you can get rid of it with a tool called OldNewExplorer that makes your browser look like more to Windows 7.

That is all what you can do with your files in the file explorer.



How to Open CRDownload Files

If you use Google Chrome, there is a strong possibility that you have seen files with the extension ".crdownload" in your download directory. Google Chrome creates one of these files each time you start downloading a file.

The .crdownload files are automatically renamed when a download completes successfully, but can be left if there is an error in the download.

As they are partial files there is no point in open.

When (and Why) Chrome Creates These

Google Chrome creates .crdownload files for your downloads. For example, let's say you start downloading a music called Song.mp3 in Google Chrome. "Song.mp3.cdownload" will appear in your downloads folder. This will grow in size while Chrome continues the download. When Chrome finishes downloading the entire file, Chrome will rename it to Song.mp3, removing the .crdownload suffix.

The .crdownload file extension indicates that the file has not yet finished downloading. So you can't open it yet.

Other web browsers can store downloads in progress in a different folder and move them to your downloads folder when they finish, but Chrome simply stores the incomplete file in your Downloads folder.

If you see a .crdownload, check your Downloads list in Chrome. You can see in the Download tray at the bottom of your Chrome window or click on the menu and select Downloads.

If it is still being downloaded, do not delete the .crdownload file - just let Chrome finish downloading it. Then you can open the downloades file.

Of course, if you really do not want to download it anymore, you can cancel the download in Chrome. Chrome will automatically delete the associated .crdownload file when you cancel the download.

Chrome Can Summarize Download With These Files

You can have a .crdownload files out there even though Chrome is not downloading something at the moment.

Open the Downloads page in Chrome and you may see that a download is incomplete.

This indicates that Chrome was downloading a file, but there was a problem - your Internet connection may have been interrupted, or the server may have cut the connection. You can also "pause" a download and summarize it later, in which case Chrome will keep the .crdownload file there.

You can try to click on the Summarize button. Chrome will try to summarize where it left off and add the rest of the file to the .crdownload . But summarizing may not always work properly. You can simply want to download the file again from the beginning.


When can you delete these files?

You are free to delete it at any time you like. If no download is in progress and you do not need to summarize a download using the file, go ahead and delete the crdownload file.

You will want to delete the .crdownload file when you no longer need it. For example, if you see your Downloads folder and see files called Song (1) .mp3 and Song.mp3.crdownload, you can delete it ending in .crdownload. This is simply an incomplete download file that you do not need. You will not be able to open it.

If you see an old for a file that you tried to download some time ago, you can definitely delete it. This can happen if you skip and do not clean the Downloads folder regularly.

If you try to download and come back to see a .crdownload file sitting in your Downloads folder, it failed to download properly (or continues to download). You can go to the Chrome download manager and retry the download. The .crdownload provides a reminder that you were going to download a specific file, but that it did not arrive successfully.

So that's what this format is - a partially complete Chorme download. It is a download in process, a failed download, or a slow download file extension.


Programs that open CRDOWNLOAD files

You can open it in windows, mac and linux with:

At the end of each filename, after the period, your extension is written. A fairly common one is tmp, which means temporary. This describes with great precision the .tmp, since it is a type of that is used in the short term and does not have real importance for the operating system of a computer.


How to Open TMP files

Windows stores temporary with the .tmp. Temporary store information in the short term if the operating system or an application can not allocate sufficient memory for all its tasks.

Applications and operating systems often generate temporary objects and files specific to a session. Which means that they are created and used only during the current use of an application or operating system. Windows removes temporary objects and files created by the operating system when the computer shuts down, as do most applications that use temporary suffix.


A tmp file can always be opened using the Notepad application; however, depending on the type, temporary objects may not be readable.

  1. Step 1 Right-click on the .tmp file you wish to open.
  2. Step 2 Select "Open."
  3. Step 3 Choose "Notepad" from the list of available programs.
  4. Step 4 Click on "Accept"


Other software,apps and programs to open tmp file:

In Word

  1. Rename the file to .doc or .docx
  2. Open it with MIcrosoft word


In Excel

  1. Rename the file to .xls or .xlsx
  2. Open it with Microsoft Excel


In Powerpoint

  1. Rename the file to .ppt or .pptx
  2. Open it with Microsoft Power Point


File Extension TMP

it is used by following type(s):

Microsoft Windows (Microsoft Windows)

type 1 description:
Default type:
suffix is related to temporary files used in Microsoft Windows.


type 2 description:
AZZ Cardfile RTF data 
It is associated with the AZZ Cardfile application.
that open:
AZZ Cardfile (Microsoft Windows)


type 3 description:
AZZ Cardfile text data 
It is associated with the AZZ Cardfile application.
that open:
AZZ Cardfile (Microsoft Windows)


  type 4 description:
IMail Server web messaging 
IMail Server Web Messaging or Mail to Beeper/Pager or Mail to Fax File
that open:
Imail Server (Microsoft Windows)


ype 5 description:
Nero WaveEditor peak 
It contains volume peaks in edited sounds, audio object. Created, when the object is opening by Nero WaveEditor.
Programs: Nero WaveEditor (Microsoft Windows)


type 6 description:
Norton AntiVirus backed up 
It is associated with the Norton Antivirus application.
Software: Norton Antivirus (Microsoft Windows)


type 7 description:
SafeDisc format
It is associated with Safedisc, a CD/DVD copy protection and digital rights management program for Windows applications and games, developed by Macrovision Corporation. The tmp used by SafeDisc version 1 and 2 are located on the game disk or game directory, such as 00000001.TMP.



SWAT temperature input

It is associated with the SWAT (Soil & Water Assessment Tool). Temperature input contains daily measured maximum and minimum temperatures for a measuring gage(s).
Programs: SWAT (Microsoft Windows)

TMP file format

A file with that ending is a type that is used as a temporary solution. They occur more frequently in the installation of a program. These temporary are created and stored until the program has completely installed all its applications.


Storage information

These  are used to store things in the programs before the information is stored correctly. For example, if you are writing something in Microsoft Word, it will be saved on the computer as a .tmp file until it is saved manually with a name and a .doc. Although most can not be opened in reality, one created for a Word document can usually be opened in that same program.



A type of .tmp has no effect on the execution of a program once it has been installed. It is only during the installation that some applications use the temporary files to prevent the memory of the operating system from becoming saturated.



Files with this format can be found on Windows, Macintosh and Linux operating systems. Some installation programs will delete temporal objects automatically when they are finished, while others will leave them on the computer until they are manually deleted.



Although the temporal do not damage a computer, there have been memory resident viruses created with that format. There are also times when these are still being used by a system that has not completed the installation.

Do not open or delete one with this format before clarifying where it comes from and what it does.




How to Open RAR Files

The rar file is used by following type(s):

type 1 description:
Default extension for .rar type:
WinRAR compressed archive
It is related to common compressed archives created in them. Most archiving tools are able to extract it
that open rar file:
7-zip (Microsoft Windows)
Advanced RAR Repair (Microsoft Windows)
ALZip (Microsoft Windows)
ALZip for Mac (Apple OS X)
Archiver (RuckSack) (Apple OS X)
Astrotite (Microsoft Windows)
B1 Free Archiver (multiplatform software)
EZ7z for Mac OS X (Apple OS X)
File Roller (Linux)
IZArc (Microsoft Windows)
PeaZip (multiplatform software)
.RAR for Linux (Linux), for Mac OS and X (Apple OS X)
.RAR Password Recovery (Microsoft Windows)
sArchiver (Apple OS X)
Stuffit (Microsoft Windows)
StuffIt Deluxe (Microsoft Windows)
StuffIt Deluxe for Mac (Apple OS X)
StuffIt Expander (Microsoft Windows)
StuffIt Expander for Mac (Apple OS X)
StuffIt for Mac (Apple OS X)
The Unarchiver (Apple OS X)
unRAR (Blackberry)
USB Flash Drive for iOS (iOS)
WinRAR (Microsoft Windows)
WinZip (Microsoft Windows)
WinZip Mac Edition (Apple OS X)
Xarchiver (Linux)
Zipeg (Microsoft Windows)
Zipeg for Mac (Apple OS X)
ZIPGenius (Microsoft Windows)
ZipZag (Microsoft Windows)


 type 2 description:
Java JCA Resource Adapter module
It  is also sometimes used for Java JCA Resource Adapter module.

Java Connector Architecture (JCA) is a standard that provides a uniform method for talking to different kinds of Enterprise Information Systems (EIS) from an application server. JCA is designed to facilitate sharing of data and to integrate new J2EE applications with legacy or other heterogeneous systems.

that open it:
Java (multiplatform software)


Steps to open a .rar file


On iphone

  • Download iZip, it is a very simple application that can help you.
  • Open the app
  • Follow the instructions provided by the application itself.
  • The iphone does not have an administrator of these. The .rar may be in an email or in the cloud.
  • Click on the icon where an arrow appears looking up.
  • Find the iZip icon and press ok.
  • From now on, all will be decompressed.

As simple as that!

On Android

Download the rar file on your mobile. Open the folder where it is located.
Download WinZip (free application). It will help you open any compressed object. With this app you can even decompress the files in a dropbox account.


In Windows

It will depend on the version of Windows you have.

Open the page to download the WinRar. It is a very useful and free tool. It can be downloaded on any computer.
If the computer has 64 bits you will have to click on WinRar for 64 (5.5) and those of 32 bits on the WinRar for 86 (5.5). It will be better to click on save before the future object is downloaded.
When you extract everything you can see the folder as a regular folder called and can view content files.


Tips for opening

If you use WinRar you have to know that it is a free application that lasts about forty days. After these days the same application will recommend that you get the full version. It is worth without a doubt, because with this you can jump many jumps that only waste time. Unlike other applications that are test you will not have to buy WinRar to continue using it.

Remember that much of what we have stored in the rar folders can not be opened with a smartphone or tablet.


How to unzip

1 Go to Wobzip. Click on "Select file" to upload the RAR to the site. Click on "Wobzip" to unlock. Then click on the links to download them without blocking.

2 Download and install WinRAR. Select "Extract here" and all within the RAR will appear in the same folder.

3 Download and install the 7-ZIP. Double-click on the file, and a box will be displayed with the ones that appear inside. Click and drag them inside the box on your desktop to "unzip" them.


This is how you open rar files extension.

How to Open a DLL File

File extension dll is used by following file type(s):

type 1 description:
Default file extension for .dll type:
Dynamic Link Library 
DLL file suffix is related to dynamic link libraries used by almost all Windows programs. Should not be deleted.
that open dll files:
Microsoft Visual Studio (Microsoft Windows)
Microsoft Windows (Microsoft Windows)
Microsoft Windows 7 (Microsoft Windows)


type 2 description:
CorelDRAW export/import filter
The DLL file extension is also associated with CorelDRAW, a vector graphics editor developed and sold by Corel Corporation.

These *.dll  contain export or import filters used by CorelDRAW.

that open .dll files :
CorelDraw Graphics Suite (Microsoft Windows)


type 3 description:
Google Chrome theme 
Themes used by Google Chrome web browser.
that open it:
Google Chrome (Microsoft Windows)


type 4 description:
Microsoft DLL dynamic web page 
The DLL file extension is used for web pages dynamically generated by Microsoft IIS Web server. File contains server-side scripts, such as Perl or VB scripts that generate the HTML for the Web page.
that open it:
Chromium (Microsoft Windows)
Firefox (Microsoft Windows)
Google Chrome (Microsoft Windows)
Microsoft Internet Explorer (Microsoft Windows)
Microsoft Internet Information Services (Microsoft Windows)
Opera browser (Microsoft Windows)
Safari for Microsoft Windows (Microsoft Windows)


type 5 description:
Virtumonde / Vundo Trojan infected 
Vundo (also known as VirtuMonde and VirtuMundo) is a malicious software application that combines both adware and trojan characteristics. Vundo is wide spread today and is probably one of the hardest programs to get rid of. Once installed, Vundo downloads and displays pop-up advertisements that often promote questionable computer-enhancement programs or fake anti-virus or anti-spyware utilities.

Lately, Vundo has been advertising several rogue programs called WinFixer2005, WinAntiVirus Pro 2006, WinAntiSpyware and RazeSpyware. Be careful could be infected!

that open it:
avast! Antivirus (Microsoft Windows)
AVG Antivirus (multiplatform software)
BitDefender (Microsoft Windows)
Norton Antivirus (Microsoft Windows)

You can open dll files with the programs and software of this article.


How to open dat File

.dat file extension is used by following type(s):

  type 1 description:
Data file - common and mostly used .dat type
It is traditionally used by many various applications or programs for their data or resource files.
Related programs
that open dat files:


type 2 description:
Video CD MPEG movie MPEG1 - common and mostly used .dat type
Video CD MPEG movie MPEG1. Extension used for some MPEG files.
Related programs
that open dat file:
Need4 Video Converter, Xilisoft DVD Creator, Wondershare DVD Creator for Mac, Wondershare Video Converter for Mac, PowerDVD, Nero Multimedia Suite


type 3 description:
Act of War game file
Package contains game data (music, textures, sounds, models, maps).
Related programs
that open it:
Dragon UnPACKer, Act of War


 type 4 description:
Antivirus data
Used by many antivirus applications for virus descriptions and information (update files).
Related programs
that open it:
AVG Antivirus, BitDefender


type 5 description:
AOL Messenger (AIM) BFTS database 
Used by AOL (AIM) Instant Messenger 6 for database .
Related programs
that open dat files:
AOL Messenger (AIM)


type 6 description:
Apple Safari dictionary 
Dictionary file used by Safari.
Related programs
that open dat files:


type 7 description:
Clarion DOS database
Database file used by Clarion.
Related programs
that open it:


type 8 description:
Corel WordPerfect merge data 
It is associated with Corel WordPerfect, a word processing program, developed by Corel Corporation. Corel Word Perfect is part of Corel Word Perfect Office suite.

The .dat files are used by Corel WordPerfect to store merge data.

Related programs
that open it:
Corel WordPerfect, Corel WordPerfect Office


type 9 description:
LabVIEW binary datalog
Binary datalog used by LabVIEW.
Related programs
that open it:


type 10 description:
LEGO Star Wars game archive
Archive contains LEGO Star Wars files (maps, objects, sprites, sounds).
Related programs
that open it:
Dragon UnPACKer, LEGO Star Wars


type 11 description:
MapInfo native format
Native map data format used by MapInfo.
Related programs
that open dat:


type 12 description:
Microsoft Internet Explorer cache
It is used by Microsoft Internet Explorer. Cache file.

Each time you open a Web page, your browser creates a cache file (a temporary copy) of the page's text and graphics. When you open the page again, for example, when you click on the toolbar Back button, your browser checks the Web site server for changes to the page.

If the page has changed, your browser retrieves a new version over the network. If the page hasn't changed, your browser uses the cache files from your RAM or hard drive to display the page. For example, Internet Explorer caches Web pages to both memory (RAM) and disk (hard drive) until the respective cache is full; Internet Explorer then rotates out pages based on age. Internet Explorer designed this system to help load Web pages quicker.

However, if you've viewed lots of Web pages, you may have an overloaded hard disk cache, which Internet Explorer will have to check before it loads a new page. Unfortunately, over time, your browser's cache grows. A cache full of outdated information is worse than no cache at all. It causes problems with Java applets, causes you to see out of date text or images, and makes your browser sluggish starting and exiting. The solution is to clear out the cache.

Related programs
that open data file:
Internet Explorer


type 13 description:
Microsoft Word for DOS data 
It is associated with Microsoft Word, worldwide most popular and powerful tool for writing documents.

The .dat files were used in Microsoft Word for DOS for some kind of data files.

Related programs
that open dat:
Microsoft Word


type 14 description:
Mozilla Firefox plug-in register 
It is used by Firefox.
Related programs
that open .dat:


type 15 description:
Nero BackItUp drive image
Suffix for Nero BackItUp drive image. Nero BackItUp automatically backs up your files quickly and easily to your choice of storage media, and creates bootable discs to restore your system if the worst happens. It includes full support for Windows Vista® virtual folders and built-in SecurDisc data protection features.
Related programs
that open it:
Nero BackItUp


type 16 description:
Skype local store 
dat file used by Skype for local store file.
Related programs
that open dat file:


type 17 description:
Sony Digital Audio Tape
Digital Audio Tape (DAT or R-DAT) is a signal recording and playback medium developed by Sony in the mid 1980s. In appearance it is similar to a compact audio cassette, using 4 mm magnetic tape enclosed in a protective shell, but is roughly half the size at 73 mm × 54 mm × 10.5 mm.

As the name suggests, the recording is digital rather than analog. DAT has the ability to record at higher, equal or lower sampling rates than a CD (48, 44.1 or 32 kHz sampling rate respectively) at 16 bits quantization.

If a digital source is copied then the DAT will produce an exact clone, unlike other digital media such as Digital Compact Cassette or non-Hi-MD MiniDisc, both of which use lossy data compression.


type 18 description:
SPOT graphic 
A system for implementing an unobtrusive, always-on-top interface-to-interfaces comprises a spot interface that is sufficiently small that it may lie unobtrusively over any open window such that it is always on top thereby enabling a user conveniently to access any available window without first having to return to a main window or close other open windows.

The spot interface comprises an active region represented by a small graphical display element (GDE) having the appearance of a sphere, which unless disabled by a user, is always visible regardless of which is the topmost window.

When a mouse pointer is moved into the spot GDE, a ring or collar having four radial quadrants representing menu items is displayed after waiting a user specified length of time.

These radial menu items are displayed around the GDE. When the mouse pointer is subsequently moved into any of the four quadrants of the collar, a secondary rectangular interface hierarchically associated with the quadrant is displayed after waiting a user specified length of time.

The secondary interface may be locked opened such that it will not close when the mouse pointer is moved out of area defined by the interface. Periodic animation of the spot GDE may be provided.

Related programs
that open it:


type 19 description:
SPOT image format
 used by SPOT.
Related programs
that open it:
SPOT images, XnView


type 20 description:
TomTom traffic data
dat file Traffic information used by TomTom applications, GPS navigations.
Related programs
that open dat:
TomTom Navigator


type 21 description:
Trillian wiki 
It is used by Trillian.
Related programs
that open it:


type 22 description:
Unfinished FastTrack download
Unfinished download used by FastTrack clients, applications.
Related programs
that open dat:


type 23 description:
Windows registry hive
On-disk format for the Windows registry.
Related programs
that open it:
Microsoft Windows


type 24 description:
Yahoo! Instant Messenger settings file
used by Yahoo! Instant Messenger, contains settings.
Related programs
that open dat file:
Yahoo! Instant Messenger

That is how you view dat files.

What is a PDF File

A PDF file is the extension file format of Adobe Acrobat reader software. It is a document format used to save documents created with previous formats, for example DOC.

This format (Portable Document Format) is a type from Adobe Systems. They invent it and perfected for more than 20 years.

It has become a standard for the exchange of electronic documents maintained by the International Organization for Standardization (ISO ). When converting any type of document to PDF, its appearance will be the same in all media.

However, unlike printed documents, these files can contain links and buttons that can be clicked, form fields, video and audio, and even programming to automate certain processes.

All this type of possibilities of including information or not is what each one of the different variants of the format supposes.

How to Open a PDF file

Currently most of the most popular and modern browsers are able to open any .PDF so you can view the document directly from it.

And yet, it is very likely that, like lots of people in the world, you have some third-party software installed on your computer just for that purpose.

The most common suspect is Adobe Reader, but when you find out about things like simply using your PDF reader you end up with unwanted Chrome extensions that collect your browsing data, you may start thinking about an alternative.

If you prefer not to download any other special program, we tell you how to simply use your web browser for that task.

Programs that open a PDF file:


in Windows

When you open this pdf file while browsing the web you do not have to worry about this, as the browser simply shows it in a tab.

But, when it comes to PDF files on your disk or other devices, by default Windows 7,10 and all the versions usually asks for a specialized program and there you end up with Adobe Acrobat Reader or similar.


With Google Chrome

If you want all your PDF files to open with Google Chrome, or Firefox, or Microsoft Edge, or the browser of your choice, you can activate a couple of very simple settings to choose the default application that will always read your files.

  1. Find a .PDF file on your computer and right click on it. Select the option "Open with" and in the following drop-down menu click on "Choose another application".
  2. Browse the list of options and if the web browser you want to use does not appear there, scroll to the end and then select "More applications".
  3. If it still does not appear, go down and select "Search for another application on your computer". If you want to open all your PDFs with Chrome, surely this will be the way you will have to go.
  4. Now navigate to the path of your computer where the browser you want to use is installed. In the case of Chrome, the .exe is located in C: \ Program Files (x86) \ Google \ Chrome \ Application. Select the executable and then click on "Open".
  5. Finally, make sure to check the box "Always use this application to open the .pdf " so you only have to double click on the icon from now on.

The process is exactly the same always, the only thing that changes is the browser that you choose.

Of course, browsers such as Chrome, Edge, Firefox, Opera, etc. they are only able to read PDF.

You cannot do any type of editing. For that if you need a specialized tool. Adobe Reader also does not let you edit anything, it only serves to see, the editor is a payment program.


PDFx format

This format is the standard format for printing on paper. This is a vital point. It is a format to reproduce on paper and all the information it contains is necessary and essential for it.

This format is a certified format, that is, when the export process finishes, the file is certified and will work as expected.

No surprises If there is a problem in the execution of the format, it will notify us so that we correct the corresponding errors.

On the other hand, the the most important difference in relation to the 'High quality printing' format is:

  • it eliminates all the extra elements that are left over and are not necessary for reproduction.


Let's give examples:

In the 'High quality printing' format, everything that the document contains is included in the file.

If we have placed an image at 300 px resolution and we have reduced it by 50% we have an image at 600px resolution, 300 px extra.

If we have cut the image with a 'paste inside', the whole image - even if only a part is displayed - will be exported next to the PDF.

With this format this does not happen. The export will:

  • eliminate the unnecessary information.
  • It will reduce the images with extra resolution
  • Eliminate everything that is not necessary for the reproduction in a printing press, such as metadata, links, video, sound ...

Also, if you want, you can match all the maps of color to leave the whole document unified.

That is the reason why sometimes a document in 'High Quality' occupies many megabytes and yet.

.PDFx quality occupies very little. What's left over has been eliminated.



When we export from Illustrator or InDesign we have .PDFx-1, .x-3, .x-4. Their differences are minimal, but they can be fundamental.

The x-1 is the basic format for grayscale paper, CMYK and direct inks. That is, the information that will be transferred will be that and only that.

x-3 is designed for hybrid formats. Therefore, it includes color information in both CMYK and RGB. Since sometimes we want to keep the original info in RGB. That is in case that same document will be displayed online or distributed digitally.

x-4 allows all the above and also transparencies and layers of information.

There is also a new x-5 in which you can use external images. That augurs that will be about images and the network.

How to open .apk files

The .apk files are applications for Android (Android Package), similar to the .exe in Windows. If you click on an .apk file from a mobile phone or tablet with Android a program will be installed.



Step 1

Files with .apk extension are packages that contain an application for Android. They have the same operation as the classic .exe files found in Windows. We click on them (from Android) and an application will be installed on your device.

They can not be installed in Windows by default (at the end of this page we will learn how to do it). They are only for devices with Android.

To open files in .apk format you should download it to your Android phone or tablet and open it from there.


Step 2


To install an .apk file on Android you must activate the option "Unknown origins" by going to: Settings -> Security

Once this is done, you simply click on the file.

A window will appear that you must accept, and it will start to be installed.


If you are an Android user you often find sites that suggest downloading the APK of some software. It is simpler than it seems but, at the same time, it can represent a risk.


What does APK mean?


Let's start with the most basic, for those users little related to technicalities. APK is called files with extension corresponding to .apk and whose full meaning is Application Package File, which was designed for the Android operating system.


What is it for?


Through these files it is possible to install programs that have been compressed (similar to a ZIP), they work in both phones and tablets -in general in any platform with a similar structure.

It is worth mentioning that, in order to perform a successful installation, it is necessary to be familiar with all the terms related to the topic, since it is not as simple as downloading an application from Google Play, opening it and enjoying it.


Is it recommended to install APKs?


Like all content that does not come from the Google store, you must test your common sense to know from which sites these files can be downloaded without risk. Not all APK files are harmful, because these sometimes represent applications that were removed from the market for different reasons that do not necessarily have to do with being a threat to your phone or tablet. They also serve for the beta versions that many developers put on their sites so that users who install it give their opinion and improve or fix errors.


If you are one of those who are constantly looking to exploit the benefits of having an Android phone, it is worth having an ativirus, but before leaving all the work to a security software, analyze the sites that suggest the download of such files and above all, know well what you are about to install to your gadget.


If I found a secure site, how do I install it?

A .apk file could contain other formats such as .dex, .res, AndroidManifest.xml, resourcers.arsc or classes.dex, to name a few, which would need specific software such as Winzip or WinRAR to read them, or an emulator. But if we think of most of the APKs, the dynamics is quite simple and only requires attention, since you usually have to click on a link that activates the download of the file and it will be hosted in your Files or Downloads section within the phone or tablet, no matter which cell phone manufacturer or model you use.


If you are installing a .apk for the first time you will surely see a message warning that the phone is set to not install programs from unknown sources.

For which you just have to go to the Settings menu.

Then to the Security section and activate the box from Unknown sources to be able to complete the installation. In some phones it appears as Unknown sources.


The .apk file can be downloaded from the phone and installed directly. If you have it on the computer, simply connect the phone by USB cable. Then, pass the file to the memory of the device.

Google allows you to activate or deactivate this option. So that you can exploit Android resources, although yes, in the small letters you read "at your own risk".


file extension apk


Open APK files in windows

File extension Apk installer for Windows is the correct option users have to open it in Windows.

In the link you will find an application very useful to manage this kind of files.



Best sites to Download are the following:

Also you can download apks from google play.




.XAPK is an unofficial format for android package files. It is a ZIP compressed format that include the android package.

You can open it with the XAPK installer. A software from APKpure. it is used to install applications in Android devices.