Reset default file open 'None '.

I opened a file with Notepad and accidentally left the box checked for "default".  How can I set the file by default open return to 'none' or 'unknown '?  I tried to open the CMD window and entering

Assoc. fileext=

(with the actual extension instead of fileext) but who did nothing that I can see.  Thank you.

You can do in the registry if you are comfortable to go. If you don't, back up the registry or at least the values that you delete. You can find instructions on how to proceed in Help and Support.

Click Run, type regedit and click OK. Go here: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts do scroll .txt, (it is Notepad file extension) Expand .txt, and then click on OpenWithList, on the right side is the list, right click and remove those that you do without fault Note Pad to open.

Tags: Windows

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