I have a z68x-ud3h-b3 F11 bios running Windows 7 64 bit with an i5-2500k CPU and a 6870 video card.
When I resume out of S3 sleep, the NT Kernel & System process starts taking a lot of CPU cycles. Only a reboot cures it.
I cannot end the task (without the system crashing). I've tried updating video drivers, etc., but nothing seems to work.
Any suggestions?