I am having trouble installing Phyx. When I go to install it it says that a newer version is installed. It is not listed in add/remove and driver sweeper turns up empty. This happened after I uninstalled driver version 290.36
More aboutphyx problem
Rusting In Peace
I'd maybe have a go at running CCleaner and see if tidying up the registry fixes the issue.
Alternatively use System Restore to wind back to a point where everything was ok.