The latest WHQL Certified Nvidia drivers can be downloaded at Nvidia's web site. Release Highlights:

- WHQL Certified
- Adds support for GeForce 7900 GTX, GeForce 7900 GT, and GeForce 7600 GT
- New NVIDIA PureVideo features and enhancements.
- Support for high definition H.264 hardware decode acceleration on GeForce 6 and 7 series GPUs.
- Support for high definition MPEG-2 inverse telecine.
- Support for high definition MPEG-2 spatial temporal de-interlacing.
- Adds mixed vendor support for NVIDIA SLI.
- TV-Out/HD-out support for NVIDIA SLI.
- Added support for VSync on Direct3D games when running NVIDIA SLI. - Microsoft DirectX 9.0c and OpenGL 2.0 support

For a full list of fixed and known issues view the Release Notes.

Download ForceWare 84.21 for Win Xp/2k here