I'm having a couple of problems with vista 32 bit. After installing a nvidia 8600gt video card my cpu usage sits around 50% while idling, not doing anything. Vista also doesn't shut down properly either now; it just hangs and I have to hold in the power button. In safe mode however it works fine, and I'm thinking it has to do with one of the windows services. I disabled all non windows services and it still does the same thing. Any suggestions?