There's a new NVIDIA GeForce driver out, this time with build 177.40. This driver is available for both Windows XP and Vista in 32 and 64-bit versions.
This driver set is commonly distributed on many websites and it is receiving pretty good feedback.
Bare in mind this to be considered a beta driver, use it at your own risk. NVIDIA does not officially support them.
There are several discussion open on these drivers in the Guru3D NVIDIA driver forums, check them here. Driver wise, pretty much any GeForce graphics card build in the last 3 years is supported. We have virus & pest checked these drivers and they are scanned as clean. if you decide to give these a try, please post your feedback in this thread.