Working in a Windows operating system, we are constantly faced with different types of files: system, graphics, audio, video. To determine the type of a file, we allow file extensions in Windows.

The file name extension is a sequence of characters that allows you to define the file format. File extensions in Windows are separated from file name by a dot. For example, the full name of the text document will be filename.doc and music track – filename.mp3. Files of a certain extension, you can bind the program “default”.  If you specify once in the file properties that a file with such an extension should be opened by a certain program, the operating system will open the specified program all files with this extension.

For example, you want all mp3 music files to be opened by a certain player. In the list of files, find any file with an extension of mp3 and right click on it. In the context menu that appears, select the "Properties" item. At the top of the dialog box that appears, you will have two lines: "file type" (where you can see the file extension again) and "application" (shows the current default application for all files with this extension). In the line "application" there will be a button "Edit. "You need it! When you click on it, the OS prompts you to select a program to open this type of files from the list of installed programs. Having chosen the necessary program, do not forget to tick the phrase "Use the selected program for all files of this type" and click OK.

What the most common file extensions in Windows? For example, the. exe is the executable files. for example, installers of the programs, rar and zip – archives. E-book are extension pdf or djv fb2. Audio files usually have the extension mp3, wav or ogg. Files lossless-audio (audio files are compressed without loss) can have an extension flac, ape or wav. Video files different extensions like avi, mpeg, mp4, mkv, flv, etc. Bitmap you can see the extension jpg (jpeg, jpe), bmp, gif, png, tiff, etc. Extension vector image  depends on the program in which they are made - for example, cdr for CorelDraw.

Generally, the file extensions in Windows often specific to your application. and open third-party application files with this extension can be difficult or even impossible. For example, the extension psd are files created in Adobe Photoshop (however, this program allows you to save the file in almost any graphical format). Text files created in Microsoft Word, you can find the doc extension (. docx for newer versions of the program) and a text editor Open Office works with the odt format. Also text files  can have the resolution txt or rtf.

How to know what types of files your operating system? Go to Windows Explorer, in the drop down menu Service select Folder  and in the dialog that appears, click the tabTypes of files. On this tab there will be a table in two columns - the file extension in Windows and the corresponding file type.

How to change the file extension?

Imagine you download from the Internet archive, but the browser somehow saved it with a resolution of htm (the resolution of the web page). Naturally, unpack the archive you will fail. You need to change the file extension on the right. However, Windows may not show the file extension, including security reasons, to allow the user inadvertently renamed a file wrong.

To change the file extension, you should to enable the display of file extensions in Windows. To do this go to Windows Explorer (double click “My computer” on the desktop or the hotkey Win E). Go to the folder where the file whose extension you want to change. In Explorer menu Service select Folder. In Windows 7  the menu may not be; In this case, click the Alt button in the Explorer window, and it will appear. Menu item equivalent toThe folder properties in Windows 7 called Folder options .

In the dialog that appears, navigate to . In Additional options  there should be a line: "Hide extensions for registered file types." Remove the tick opposite to it and do not forget to press the OK button! Now the file extensions in Windows will be displayed, and you can change the file extension. Also, file extensions are often displayed by default in many file managers, for example, Total Commander. We remind you that you can rename the file by pressing the F2 key or by selecting the "Rename" item in the context menu of the file (it is called with the right mouse click).

However, this technique will not allow you to change the format of the media file.  You can not make an avi file from an ape file or an avi file from the mkv file, simply by changing the file extensions. To change the format of audio and video files, you need special programs that convert one multimedia format to another. Also remember that if you change the file extension incorrectly, you can not open it. You can say that file extensions in Windows - not a toy!

How many installed programs, with such an outrage has not yet encountered. You at least wrote, on what models of netbooks it is installed without problems. I am among those unfortunates who do not have a black screen and do not react to any key and mouse. Thanks to the familiar computer technician advised to pull out the battery, Windows booted up, but on the desktop this muck, which does not start and is not deleted. Still deleted through "all programs". In short, if you really want this program, then when installing on a netbook MSI wait for problems. You can blame me for incompetence, but the usual pictures do not cost such sacrifices and difficulties.

I still do not understand how much is the extension of my program for printing text documents via the Internet. I do not have money for 13 years and I live, who will file what, but now I have started my pension question, maybe in Russia someone I care about. But to appeal to all instances with errors, it's a shame. So I need an add-on in the software to check the grammar of my spelling, but if I do not find one, I hope someone will help, but not the moneybags shaking over a penny. We all die in this world in a coffin, or what you can not do, only one in the cemetery will be called a jackal, and the other person and the memory they wish will be eternal. Yuri Mikhnin. Ulyanovsk

Thanks for the simple and understandable explanation.