I have a very weird problem about my EAH5770 card. I use this card play games such as prototype, batman asylum is experiencing laggy gameplay. The weird thing is, whenever I reinstall driver to the video card. Game play goes smooth again. When I restart the company, I experience laggy gameplay again.
I tried to uninstall CCC and use driver sweeper to clean video driver completely. All my motherboard's driver should be up to date. Follow is my computer's spec.
AMD athlon II
Win7 32bit Ultimate
Do these restarts initiate by you rebooting ? If your computer always crashes it could be in some kind of cycle where it updates, re-writes old system files over current ones, because it thinks its repairing.
A reinstall might be your best bet.