I am running Portal 2 and try to use DirectVR. However, the notification says ‘Starting the scanner failed. Sorry.’
I have tried to restart PC and the game but the same issue remains.
Sounds like a corrupt install. Please try to reinstall vorpX.
Also make sure to exclude the vorpX program folder from your AV scanner. The memeory scanner might be considered malicious by some of the more annoying AV apps. If you use anything else than Windows Defender, consider uninstalling it. Windows Defender will kick in instead. Just as good, less invasive.