Hey guys, my friend need some help, he built an own PC and installed all drivers (NVIDIA GeForce GTX 960 4GB). All worked fine, but as he restarted Windows, all games began to lagg and Windows Aero was deactivated.
As he reinstalled the NVIDIA driver, all worked again (Windows Aero and all games) but on restart all began to lagg again.
I never had such problem, so he need some help.