As my old NCR Software instructor would put it, "don't worry about it, software will handle it".
When you shut down Windows, you're only shutting down the OS and not really the computer itself. Your PSU is still powered up and providing voltage to the motherboard.
Somewhere in your Bios or OS is a setting that's causing your OS to come Alive again.
If you don't correct that setting, the only way to keep your computer OFF is to plug it into a switchable Power Strip. It's really better for your computer, if you'll just do that. And, at least the better Power Strips have Surge Suppression, spike protection, and RFI protection.
Once you've told Windows to Shut Down, and the lights go out and the fans stop, then switch OFF the power, and you can be assured that your PC will not come back on by itself.
On investigation, it seems that many have experienced it in Windows 11, so my assumption was in error.
Ms he pages reccomend this:
Check and follow these steps:
1. Right click the start icon and select Device manager
.2. Select Power options. in the upper left portion select "Choose what the power buttons do". Then click on "Change settings that are currently l
Check and follow these steps:
1. Right click the start icon and select Device manager
.2. Select Power options. in the upper left portion select "Choose what the power buttons do". Then click on "Change settings that are currently unavailable."
3. Under Shutdown settings remove the check for the box to Fast turn on fast startup (Recommended).
IF this will not solve it, next will be :
1. right click the start icon, and, in the run box, type in regedit and hit Enter to open the Registry Editor.
2. Go to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > SessionManager > Power.
3. Set the value of HiberbootEnabled to 0. (Probably already there by default)
unavailable."
3. Under Shutdown settings remove the check for the box to Fast turn on fast startup (Recommended).
IF this will not solve it, next will be :
1. Right click the start icon, and, in the run box, type in regedit and hit Enter to open the Registry Editor.
2. Go to HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Control > SessionManager > Power.
3. Set the value of HiberbootEnabled to 0. (Probably already there by default)
Readers seem to be satisified that this did the trick??
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