Download: nZone
Vista: 32-bit / 64-bit
XP: 32-bit / 64-bit
Thanks to BiGBrOwNPimpsta for the submit!
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Nvidia has released new beta drivers for Windows XP and Vista, both 32-bit and 64-bit versions. The drivers appear to have fixes for game compatibility for Crysis and Bioshock, as well as a range of bug fixes. Check out the release notes for specifics.