Sometimes after downloading a video file from the Internet, it does not open, and a notification appears that the operating system could not open the file. It is also suggested to select a program to open it manually. The problem is that, most likely, the correct extension is not written to this file. And without it, the OS doesn't know which program to use to open it. This problem is completely solvable. All you need to do is write the correct extension.
Necessary
Windows computer
Instructions
Step 1
If you are using the Windows XP operating system, then you can change the file extension to video in this way. Click on the file with the right mouse button. Select Rename from the context menu. The file extension follows immediately after the name, after which you need to register it. In most cases, the extension of the video file Avi. But, of course, there may be other options, for example, 3gp, this format is often used by mobile phones. If the video is in DVD format, then its extension will be Vob.
Step 2
There may be a case when the file extension in Windows XP is not displayed. Follow the steps below to activate its display. Click on any folder with the right mouse button and select "Properties" from the context menu. After that go to the "View" tab. Find the line "Hide extensions for registered file types" there. Uncheck the box next to this line. Save your changes. To do this, click "Apply" and OK. You should now be able to change the file extension.
Step 3
File extension is not available by default in Windows 7 operating system. To activate it, you need to do this. Click Start. Go to the "Control Panel" and open the component "Folder Options". Then go to the "View" tab and uncheck the box next to the line "Hide extensions for registered file types". Click "Apply" and OK. Now you can change the file extension.
Step 4
Click on the file with the right mouse button and select "Rename". You will see the file name is highlighted followed by its extension. It is the unselected part that needs to be renamed. If only the selected fragment is displayed, this means that no extension at all is assigned to the video file, and it should be added immediately after the file name.
