i installed the NVIDIA GeForce Graphics Driver Hotfix 364.96 update last night and this morning my living-room PC looked like this in 3D apps:

little colored blocks, flickering lines, sometimes a whole strip of the screen goes green for a moment... it doesnt crash, it just looks horrible :) my stomach dropped because artifacts usually mean dying hardware, right?? but its suspicious that it started exactly after teh update... how do I tell which one it is without spending money??