This is what happened.  I just installed two sims on my new WD 160 gig hard drive.  CFS 2 and MSTS.  They both worked okay immediatly following.  Then I installed RIVA Tuner, set it up and some over clock settings.  When I tried Train Sim the opening screens played out but when I loaded the simulation it immediatly minimized itself to ther quick launch bar at the bottom of the desktop.  I tried CFS 2 after several attempts at getting train sim to run right and same deal happened. With both sims I was unable to restore them either and I ended up having to end program.  I restored my clock settings to nvidia factory levels on my card, didn't help.  I un-installed RIVA, didn't help.  I did system restore and right then my wife chased me off the pc to use it herself and I had to do some errands and now I'm at my mom's so I haven't had a chance to do anymore yet.  Has anyone else ever had these problems??? Would anyone know what could cause them?  Would it possibley be better to install any graphic related software utilities before a sim or a game?  Thanks
Gary