The text as written does NOT function.
This is the one that has problems.
reg add HKCU\Software\Classes\CLSID{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32 /ve /d "" /f
The correct version is:
"reg add HKCU\Software\Classes\CLSID{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32 /ve /d /f"
The quotes need to be at the beginning and the end. After I made the modifications, the problem was resolved.
Maybe you entered the command at a PowerShell prompt instead of a Cmd prompt? That would result in a error.
The command you posted as being correct (the one with quotes at each end) will produce this error at a Cmd prompt:
The system cannot find the path specified.
At a PowerShell prompt, it will echo back that string but not do anything.
The command posted by EmilyS726 is correct for a Cmd prompt, but the /d "" part is superfluous and it should be run in a normal Cmd console. There's no need to Run as Administrator and that will result in the wrong profile being changed if your account is a Standard user.
The command can be simplified to the following and should be run at a normal Cmd prompt:
reg add HKCU\Software\Classes\CLSID\{86ca1aa0-34aa-4e8b-a509-50c905bae2a2}\InprocServer32 /ve /f
Note: For anyone struggling with the command line, you may also use my free SwitchExplorer tool to apply the setting for you.