How to restore the computer extension, and what happens if the extension of the computer file has be

Click Start in the lower left corner of the computer, select the file explorer inside, enter the top of the interface to see a viewing point, click on it to see the file extension name in the position marked on the right, and put a check on the front, then you can see the suffix name behind the file.

1. For example, accidentally bai put du".XML" file is selected as Notepad as the default opening formula;

DAO 2, then press win+r on the keyboard zhuan to open the running program, shu type regedit and press enter;

3. Open the registry and find the computer hkey current user software Microsoft Windows CurrentVersion Explorer Fileexts[Select the extension of the wrong file opening method], you will find that there are openwithlist and openwithprogids, if there are other options to delete them;

4. Delete all key values in openwithlist except for the default;

5. Delete all key values in openwithprogids except for default and lnkfile;

6. Close after all are deleted, win+l can be logged out.

Here's how to modify it:

1. Open the My Computer, Tools, and Folder options, switch to the View tab, and enter the regular Info option by default.

2. In the advanced settings, the office browses to hide the extension of the known price type, and removes the checkmark in front of it, so that all the files in the computer will display the suffix, which can be modified directly.

3. The extension is unknown, change the extension to chk, and use the chk text to repair the correct extension to restore the correct extension.

The solution to the problem that the extensions of the computer files have been modified.

1. The computer generally does not display the file extension by default, if you want to modify the suffix, you need to display the suffix before you can modify it.

2. It's OK to set it in the folder options, open the folder options, as shown in the figure below, the display extension needs to be set in the viewing panel, and click on the text in the red box.

3. The view panel is as follows, there is a hidden known file extension in it, and you can see that the previous tick has been ticked.

4. Click the left mouse button to remove the tick, 5. After removing the tick, click the application icon below, and then click to confirm.

6. When you return to the desktop, you can see that the previous file suffix has been displayed as. txt.

7. Double-click the file name, pay attention to the double-click, you need to pause for about 1s in the middle, so that the file name can display the mode, 8. Modify the suffix name of the file, and select Yes in the pop-up box after modification. Finally, you can see the file on the desktop that has successfully modified the suffix.