This command deletes the entire key you created. The /f flag forces the deletion without prompting for confirmation.
reg add "HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InprocServer32" /ve /t REG_EXPAND_SZ /d "%SystemRoot%\System32\example.dll" /f This command deletes the entire key you created
Below is a clear, safe, and educational explanation of what that command is likely intended to do, along with a corrected version and warnings. This command deletes the entire key you created