I haven't raced in a while but I upgraded to S3 and installed the latest update the other day. I was about to try it with my new Oculus Rift but as soon as I click the icon the PC restarts (clean install of LFS -> NO CFG files or anything). Tried again with the same result.

All other sims work (iRacing, Assetto Corsa, Project Cars).

Help anyone?

Did you install LFS on the root of the drive, or in Program Files? LFS always seems to work better if you install it in C:\Games\ or something similar, rather than the PF folder.

I disconnected all my extra monitors and reinstalled a third time. Seemed to help.