hi, can you tell me where you have SteamVR installed ?
manual way is to register driver manually
in folder:
C:\Program Files (x86)\Steam\steamapps\common\SteamVR\bin\win64
you need execute
vrpathreg adddriver ‘path to driver4vr driver folder’
in my case it is
C:\Program Files (x86)\Driver4VR\lib\drivers\driver4vr
let me know if that works.
if you don’t mind telling me where your installation is I will try to fix problem.