Not sure you have the latetst drivers. Wanted to check it out at Nvidia, but their sites seem broken atm. And to anwer the question, no I don't have the problems you have, using a Geforce GT 240M on my Win7 64bit laptop. I know, different card, but generally same drivers. (except mine is a laptop card). Try reducing your available memory, since you are allocating 100% of it to Vue (if your card has 1 gig, which I assume it has), and some is needed by Windows. I set mine to 850 megs.