description: NVIDIA Windows Kernel Mode Driver, Version 397.31 Bug check description: This indicates that a system thread generated an exception which the error handler did not catch. This appears to be a typical software driver bug and is not likely to be caused by a hardware problem. A third party driver was identified as the probable root cause of this system error. It is suggested you look for an update for the following driver: nvlddmkm.sys (NVIDIA Windows Kernel Mode Driver, Version 397.31 , NVIDIA Corporation). somehow crashed at like 1130pm, interesting part is i put my pc to sleep at like 9pm so go figure. shame since i was hoping to get away without having to update these for quite some time. On a surround+SLI system its pretty much aids every time i do so i save it for big/important drivers usually.