hello, i am still having an issue with my Nvidia card, SL and Windows 7. Nvidia says its a time out issue with MS, MS says, The TDR registry keys IS honored by Windows 7 as well. It does not exist by default in Windows 7, if you need to modify the DEFAULT behavior then you need to create the registry key and provide new values. Please note that, the registry keys are intended for driver testing and debugging only. "You can use the following TDR-related registry keys for testing or debugging purposes only. That is, they should not be manipulated by any applications outside targeted testing or debugging." http://msdn.microsoft.com/en-us/library/ff569918(VS.85).aspx http://msdn.microsoft.com/en-us/library/windows/hardware/ff570087(v=vs.85).aspx If you are having issues with GPU response, you should instead try changing the driver or investigate the Graphics hardware. from what i can see i just want to increase the TDR to 3 or 4 seconds. Is this wise or is there a better option? Thank you,