I have a PC with i5 and a Geforce GTX 570 running Windows 10. All was running well until I installed Witcher 2 through Steam. On the first start the game installed some drivers (at least I think) and the game crashed. After that the PC always crashed after a few munites. I uninstalled the game in safe mode, but that didn't help. So I decided to format C: and install Windows 10 fresh. The installation went fine, but now the same crashes happen as soon as the graphics card drivers are updated. It doesn't matter if I let Windows Update install the driver or install directly via Nvidia installation file downloaded from the Nvidia website. When I restart the PC after a crash, I get the error message DPC_WATCHDOG_VIOLATION on boot. Google searches didn't help fixing the issue. And Safe Mode still works. All was running well before. Do you have any idea how I could fix this? Could it be that my graphics card is damaged?