Here's my PC configuration:
- Intel Core i5 2500K
- 16GB RAM
- Asus P8P67 Pro BIOS 3602 (the latest available release).
- NVIDIA GTX 1060 6GB
- Windows 7 64
After applying the aforementioned patch the system hangs/freezes on reboot (some people erroneously call it "restart"). The monitor first goes black, then powers down but nothing happens - the system keeps running without actually rebooting. I have to press the reset button on my case in order to reboot.
There are no messages in the system log after rebooting.
It seems like this patch makes Windows send the wrong sequence of instructions for this CPU.
This has never been the case for this PC prior to this update. Linux reboots just fine. Windows 7 prior to this update has always rebooted just fine.
The issue goes away once you uninstall this update.
Please investigate and fix.
Edit 2018-02-10 09:48pm GMT: the issue is related to CPU C-states handling (C3 or C6), so it might or might not be related to the KPTI patches added in this update. One thing is sure: it's a major regression.
Edit 2018-02-14: KB4074598 doesn't fix the issue. Systems with Sandy Bridge and Ivy Bridge CPUs are affected.
Edit 2018-02-26: Woody Leonhard mentioned the issue in his Ask Woody blog. The initial reporter is utterly confused though, says that reboot leads to hibernation. No, it does not lead to hibernation at all.
Edit 2018-03-13: KB4088875 fixes the issue.