I have Vista RC1 installed on a Biostar Tforce 6100 MB, Sempron 2800 64 bit, 1 gig RAM, Nvidia 6200 128MB Video card. Everything is just ducky here. The X64 installed as smoothly as the X32 version and runs as fast or faster than XP on the same system. The only drivers I had any issues with was installing the AC97 Realtech sound driver and the beta driver worked fine from the Realtech web site. It must be something between your hardware and the software that isn't communicating properly. pcgeek11
