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03-07-2018 01:50 PM
The January and February Quality and Security Windows 7 Updates have caused a Restart issue on Sandy and Ivy Bridge processors.
My customer's Z210 has a i7-2600 processor. After KB4056894 was installed the PC hangs on restart about 60% of the time. The symptoms are black screen about the time that you'd expect to see the HP logo. The keyboard is inactive, no mouse cursor, fans running and power light on.
Removing KB4056894 resolves the restart issue. Others have found that the Feburary updates cause the same problem.
Some people have had success by disabling the C6 or C6 Report power states in their BIOS.
I've attempted to find those power state controls in later model HP Workstation bios setting but have not found them.
I'm hoping that someone can tell if those controls exist in the Z210 bios and if so how to find them.
03-07-2018 05:20 PM
I recomend that you first check the windows error log file(s) and see what is causing the error before you do anything
if nessary disable the restart on error setting, so you can possibly check the logs before restarting if not restart and then check the lerror og files
03-07-2018 06:18 PM
I guess I wasn't clear on the problem.
This has nothing to do with a restart resulting from a windows error. It happens when a restart operation is performed, either manually or scheduled after the January Windows 7 updates.
What I'm trying to find out is how to get to the C-state settings in the HP bios. Dell and many motherboard manufacturers have them available in their bios.
03-08-2018 10:57 AM
the windows logs will show if any service/task is failing or timing out on the boot or reboot sequence
windows logs the initial boot sequence, besides logging the running OS
if you have another bootable drive, i would try removing your boot drive, installing that and see if it boots normally
if so the issue is most likely with your OS on the original drive
03-10-2018 08:17 AM
I finally found the setting to disable C-State in the HP Bios.
It's in Power > OS Power Management > Idle Power Savings (change from "Extended" to "Normal"), Extended is the default.
This problem is discussed at https://answers.microsoft.com/en-us/windows/forum/windows_7-performance/windows-7-hangs-on-reboot-af...