Hi Guys,
I was reading the previous post, and tried several solutions without finding anything that I solved my problem.
Personally single game League of Legends, and always freezes. But it all stopped when I installed the NVIDIA 304.48 BETA driver, and I chose the performance first. And I have not been frozen since.
This is the link http://www.nvidia.com/object/win7-winvista-64bit-304.48-beta-driver.html