It seems that Nvidia is releasing new drivers too often.
This time, version 169.25 Beta are the latest available.

Changes are mostly related to SLI.
Read the release notes to see all the fixes and current issues.

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A new version has been released. I always get them to keep my audio updated with the latest version available.

If you experience problems with drivers, use Guru 3D Driver Sweeper after you have uninstalled your current drivers to clean the system before installing the new ones. You can do this right in you windows session or in Safe Mode.

Unattended usage:
setup.exe -s -f2<path\LogFile> -z[-rp<path\LogFile>]
example:
setup.exe -s -f2C:\mylog.log -z[-rpC:\RHDSetup.log]

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Quote from Nvidia:

NVIDIA® nTune is the ultimate utility for accessing, monitoring, and adjusting your system components, including temperature and voltages with clear, user-friendly control panels. Overclock your system for highest performance or underclock it for near silent operation. All changes are performed within the Microsoft® Windows® interface – enabling full functionality without the need to make changes in the BIOS and reboot your system.

The Nvidia nTune page doesn’t show this new version yet, but you can get it from several locations.

Note: The downloaded file name says it is for XP but it works with Windows Vista.

Download from Nvidia Download from MajorGeeks