My system worked fine for a week or two, then <poof> started hanging on windows startup (just after 'the sound' starts). All I did is reinstall drivers on my vortex2 card. Eventually formatted + reinstalled, and discovered that as soon as I installed my GeForce Drivers, the sytem would hang again. I've tried many things - seems independant of VIA 4-in-1 drivers and the AGP GART drivers. System is rock solid as long as I keep PCI VGA display adapter. Any thoughts?