What's the Hash in HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.\UserChoice?

Question

With Windows 8, the user\'s choice for which application to open for a given document type seems to be kept in

HKEY_CURRENT_USER\\Software\\Microsoft\\Window         


        

Answer 1

By the way, these userchoice hashes in a profile become invalid after a sysprep, causing all those "an app default was reset" messages during the first login after sysprep, and many log entries in Microsoft-Windows-Shell-Core/AppDefaults.