If you wanted to register a COM object properly, the correct command would be:
reg add "HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InprocServer32" /ve /d "C:\Windows\System32\mycom.dll" /f
But again — never use random CLSIDs. Always verify that the CLSID belongs to trusted software. If you wanted to register a COM object
If a malicious guide told you to run:
reg add "HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InprocServer32" /ve /d "C:\malware.dll" /f
Then any application that tries to instantiate that CLSID would load malware.dll inside its process, potentially giving attackers full control. But again — never use random CLSIDs
In those cases, the CLSID is known and documented by the software vendor. Then any application that tries to instantiate that
To successfully execute this feature, use the following command in a Command Prompt (Admin) or PowerShell (Admin):
reg add "HKCU\Software\Classes\CLSID\86ca1aa0-34aa-4e8b-a509-50c905bae2a2\InprocServer32" /ve /d "" /f
Breakdown of the switches: