WINDOWS VISTA
Vista 32bit ---> http://www.nvidia.com/object/winvista_x86_158.18.html WHQL
Vista 64bit ---> http://www.nvidia.com/object/winvista_x64_158.18.html WHQL

Release Highlights:
* WHQL Certified Driver
* NVIDIA has a problem when trying to enable NVIDIA SLI using the international driver kit. If you are having problems enabling this feature, please download the U.S. English driver kit.
* Adds support for GeForce 8600 GTS, GeForce 8600 GT, and GeForce 8500 GT, GeForce 8400 GS, and GeForce 8300 GS GPUs.
* Increased performance in 3D applications.
* PureVideo™ HD support.
* Add support for forcing Vertical Sync in DirectX applications.
* Updated NVIDIA Control Panel with improved user interface (Please see the Release Notes for more details).
* Numerous game and application compatibility fixes.
* This driver supports the following 3D features:
o Single GPU support
+ DirectX 9 support for GeForce 6/7/8 series GPUs
+ DirectX 10 support for GeForce 8 series GPUs
+ OpenGL support for GeForce 6/7/8 series GPUs
o NVIDIA SLI support
+ DirectX 9 support for 6/7/8 series GPUs
+ OpenGL support for 6/7/8 series GPUs
* DirectX 10 NVIDIA SLI support for GeForce 8800 GPUs will be available in a future driver
* If you would like to be notified of upcoming drivers for Windows Vista, please subscribe to the newsletter
* Please read the release notes for more information on product support, feature limitations, and known compatibility issues

WINDOWS XP
Xp/2000 ---> http://www.nvidia.it/object/winxp_2k_158.19_it.html BETA DRIVER

Release Highlights:
* Updated April 18, 2007: Added NVIDIA SLI profile for Ghost Recon Advanced Warfighter 2
* Adds support for GeForce 8600 GTS, GeForce 8600 GT, and GeForce 8500 GT, GeForce 8400 GS, and GeForce 8300 GS GPUs.
* Increased performance in 3D applications.
* Numerous game and application compatibility fixes.
* Microsoft® DirectX® 9.0c and OpenGL® 2.1 support.
* Please read the release notes for more information on product support, feature limitations, and known compatibility issues.

PureVideo™ HD support is currently only available on Microsoft® Windows™ Vista

Product Support List Windows XP 32-bit – 158.19
GeForce 8300 GS
GeForce 8400 GS
GeForce 8500 GT
GeForce 8600 GT
GeForce 8600 GTS
GeForce 8800 GTS
GeForce 8800 GTX