This link explains it better than I can http://www.dedoimedo...ia-freezes.html and is spot on!
Long story short, I have a GeForce 560 GTX and ever since around version 320.xx my PC keeps freezing (mouse stops moving) and much of the time audio freezes too which results in a not so nice sound emitting from my speakers.
I have reverted back to 311.06 - which is recommended by the above link - and without all the 3D Vision and HD Audio drivers crap that comes with it.
The last thing is also that I've had to disable Windows Update from automatically downloading and installing updates since Nvidia drivers are delivered through that too.
Anyone else having this and want to share some experiences, other solutions?