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This article introduces how to remove the error program in the list of unknown file formats in window. The content is very detailed. Interested friends can use it for reference. I hope it will be helpful to you.

We know that a file with an unknown file format will be displayed as a blank sheet of paper, and every time you double-click such a file, the system will pop up the Open method dialog box, and if you have opened the file by misuse of a program, then 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 the file, the following dialog box appears. So, how to get rid of it?

* Win+R runs regedit

* navigate to HKEY_CURRENT_USER\ Software\ Microsoft\ Windows\ CurrentVersion\ Explorer\ FileExts\ [file extension]\ OpenWithList

* find the file extension in the list on the left, for example, what we call .003

* find the program key value to be deleted on the right. For example, in our example, Adobe Reader, the key value in the registry is called AcroRd32.exe. Right-click to delete.

On how to remove window unknown file format open method list of error programs to share here, I hope the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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