Guys,
There is a major incompatibility with Rift and lastest Nvidia drivers. I sent a message to Dan regarding this. It creates a whole bunch of issues inside FI which are not related to FI.
You have to go back a couple of versions. Read the big red box on this page: https://support.oculus.com/
Honestly, unless you are using your machine for other more modern games, I'd stick with a solid Nvidia driver and don't be in the beta program for Oculus. Rift Core is absolutely no use whatsoever to us and currently just creates problems. Eventually it may be useful for a more unified controller interface, but right now unless you spend your time in Oculus home with controllers you benefit nothing.
In fact if you start FI after a machine reboot, the latest Oculus software with rift core doesn't get loaded up in time for the simulator. You have to start Oculus manually before FI.
The Nvidia driver version I rolled back to dates from spring last year and is rock solid. Some people tend to 'driver chase' with Nvidia because they release new drivers every two weeks. Its very rare a driver update does anything to otimize our experience in FI, it does is adds more bloat with code that is only relevant for certain new games. Roll back to an older stable driver, click advanced during the installation and uncheck 'Nvidia Experience' . There's not much we can do about the Oculus updates automatically happening apart from not participating in the public beta channel and currently unchecking 'Rift Core'. I detest being force fed updates and useless features when I have an already stable system.
Alan.