HP Slim Desktop 290-p0056 will not wake up

[billh42641]

Windows recently updated with a bunch of updates.  PC goes to sleep and will not wake up.  Move to another outlet and it will wake up, but when it goes to sleep, it will not wake up.

[WAWood]

@billh42641 

I see you're running Win10 and that comes with a new form of Hibernation enabled by default -- and that could be causing the issue you're facing.

Win10 has enabled a new hibernation process known as Fast Startup -- which is enabled BY DEFAULT.

This is different from Fast Boot, which is a BIOS/UEFI option.

Fast Startup is supposed to dramatically speed up the booting process, but in some PCs, it actually slows it down or causes it to hang. It's also a new form of hibernation known as hybrid sleep -- and this causes battery drain to maintain the state of the PC while turned off.

Disabling Fast Startup might fix the wake-up problem.

There are two ways to disable FastStartup in Win10: (1) through the Control Panel, and (2) through an elevated command prompt.

Control Panel - Open Control Panel --> Power Options.
Select "Choose what the power buttons do"
Select "Change settings that are currently unavailable"
At the bottom of the Window, under Shutdown settings, uncheck the box regarding fast startup

Elevated command prompt - run the following command:
REG ADD "HKLM\SYSTEM\CurrentControlSet\Control\Session Manager\Power" /V HiberbootEnabled /T REG_dWORD /D 0 /F

In both cases, reboot Windows.

NOW, FastStartup is disabled.

See if that helps.