Sunday, 17 February 2019

windows - Failed installation of 7zip caused File Extension folders to disappear in Registry

When I tried installing 7zip, an issue occurred that removed a few extensions, most notably .7z and .rar. I'm not really sure what caused the error to begin with.


Due to that error I can no longer associate a program with a file type. Each time I try to open a .7z file, Windows will always ask what program I want to open this with, the selected program runs but the choice will never be saved.


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They were only removed from HKEY_CLASSES_ROOT, the folder to associate programs still exists from HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Explorer/FileExts


I was wondering if anyone has a quick solution to this that I could do myself, if not then my best guess for what to do afterwards is to import from a friend their folders of the missing types.

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