Hello, Thank you for taking the time to view my thread. I have been having an issue for the last 2 driver releases 397.93+397.64 where Windows is hanging/freezing constantly. 30 seconds after I log into Windows, it will hang for like 5 minutes. Then it will be fine, but it will freeze again and again later for a few minutes each time. There does not seem to be anything related to the drivers in the event viewer at the time of the hang. 391.35 works perfectly and I keep having to roll back to it. I have done the driver upgrades with DDU, and also without my SLI bridge. Nothing is helping. I have 2x 1080 TI in SLI.