To check if the key exists after addition:
reg add HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509 Creates or modifies the registry key for a Component Object Model (COM) class identified by the GUID 86ca1aa0-34aa-4e8b-a509 under the current user's (HKCU) view of Classes\CLSID . Reg Add Hkcu Software Classes Clsid 86ca1aa0-34aa-4e8b-a509
Always verify the associated server path (DLL/EXE) and remove the key if it points to unrecognized or unsigned binaries. This write-up is for educational and defensive security purposes only. Unauthorized modification of the registry can break applications or compromise system security. To check if the key exists after addition: