Let me break down what you likely want, and then give you the corrected command.
The command you provided is a well-known Windows Registry modification used to .
reg add hkcu software classes clsid 86ca1aa034aa4e8ba50950c905bae2a2 inprocserver32 f ve free
/f : Forces the addition of the registry entry without a confirmation prompt. How to Apply It
If you want to go back to the standard Windows 11 look, run this command and restart your PC or Explorer: