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Most users have encountered files they have yet to see or recognize at least once during the entire course of their computer activities. With the easy accessibility of computers nowadays and the number of infectious computer viruses being created out there, it is only right for users to be capable of properly identifying unknown files and save their computers from being temporarily or permanently damaged.

Files in computers have lots of names and extensions. Users may identify the types or classes of these unknown files by looking at its extensions. File extensions are usually the 3-4 letters that come after the dot (.) of the filename. However, it is not uncommon to see 5+-letter file extensions these days. Examples of 3-letter file extensions are .doc, .sys, .dll, and .exe, and.docx and .jnlp are examples of 4-letter extensions. By knowing these file extensions, users can identify the computer program they can use to open, run, create, or edit these files.

Researching about file formats unknown to users can help identify the programs needed to open such files. The program-specific features and file extension-designated purposes will also be known to users through extensive research. When the application suitable for opening and using a file format has yet to be installed on the system, it is necessary to download the trial version of the application in order to try running these unknown files.

After installing the program appropriate for using the unknown files, it will be possible to run, create, edit, or use the unknown files in various ways. Some of the most common objects users encounter as unknown files and their respective file extension varieties are listed below for your reference.

Common Document File Extensions

1. .doc
2. .txt
3. .rtf
4. .docx
5. .html
6. .htm
7. .odt
8. .wpd
9. .pdf

Common Video File Extensions

1. .3gp
2. .avi
3. .dat
4. .mov
5. .mpeg/.mpg
6. .ogm
7. .divx
8. .rm

Common Audio File Extensions

1. .wav
2. .wma
3. .mp3
4. .ra
5. .mid

Common Image/Picture File Extensions

1. .bmp
2. .jpeg
3. .gif
4. .ico
5. .tiff
6. .raw
7. .png

When users encounter problems with any of the unknown files in their computer, most of them prefer executing the registry cleaner installed in their systems to scan the registry and remove or repair unnecessary and damaged OS registry data. The registry cleaner scans your Windows registry for any unwanted file or program that hinders your unknown file from running despite the installation of the particular program required to open it.

Tags: extension, file extension unknown, files

This entry was posted on Tuesday, October 21st, 2008 at 9:02 am and is filed under File Extensions. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.