Remove the error program that opened the unknown file


We know that files in unknown file format will be displayed as a blank piece of paper. When you double-click on such a file, the system will pop up the Open Mode dialog box, and if you If you accidentally use a program to open the file, the program will appear in the list of open programs. For example, create a new file named test.003, open it once with Adobe Reader, and each time you double-click this file, the following dialog box will appear. So how do you get rid of it?

*Win+R runs regedit *Locate to HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerFileExts[file extension]OpenWithList *Find the file extension in the list on the left, for example, we said .003 * Find the program key to delete on the right side Value, for example, our example of Adobe Reader, the key name in the registry is AcroRd32.exe, right-click to delete