I manually locked my PC and left it for about an hour and upon returning, I moved the mouse and clicked to turn back on the screen. This would normally work when I've done it after shorter periods I might add - but on this occasion it failed and I had to press the power button on the PC to turn it off and back on again.
I checked power management, and everything necessary to keep the PC 'running but in a state of sleep in this situation' is set , i.e. the hard disks are set to never turn off, 'allow this device to turn on the computer' is set for all devices, etc.
Was advised this on Copilot:
Could be a number of reason but..
"Might need a BIOS Update: An outdated BIOS can cause various system instabilities, including wake-from-sleep issues"
Was advised a list of tasks in a process of elimination, and the BIOS definitely needs to be looked at.
Saw that the BIOS hasn't had an update available since May 2025 for the z790-E II:
I'm reaching out to support to provide the latest BIOS for this motherboard if possible and if not deprecated. Please let me know, thanks.
