Hi Kevin, i’ve been trying your clues, but my computer still restarting on shutdown process. It’s now 5 years suffering this, let me explain my technical experience, since i’m an electronic hardware technician.
I’ve started suffering this problem since i was having an AMD dualcore with an asus mother board and Windows 7 Proffessional installed.
After trying a lot of things i decided to upgrade my computer
4 years ago: The first i changed was the motherboard (Gigabyte), cpu (i5 4570) and 2x4GB crucial DDR3 RAM memories, i was running Windows 7. Problem still there
3 years ago: changed the graphic card and HDDs. Upgrade my system to W8 and then W8.1 with a clean wiped disk. Problem still there with a new OS and updates up-to-date OMFG!!
2 years ago: changed the mother board (now an Asus Z97-Pro Gamer), 2 new Power Supplies tested with a special PS multimeter, i’ve checked the power button with a multimeter, but problem persist I Upgraded my W8.1 to W10, formatted the computer and made a clean installation of W10, tryied with a spare disk with W7 and W8.1.
One year ago: My wife purchased me a new computer case (although the button was not the problem) and i’ve changed it. But problem still there.
Today i’ve tested your post related solution, and i’ve go a stpe forward disablin the Fast Boot option in my UEFI BIOS, but the problem persist.
The system still working perfect except for this “rebooting instead shutdown”
My actual computer is tottaly “new” except for the processor (i5 4570) and DVDRW drive. As an electronic hardware tech, i always perform a full dust clean up and termal silicon change of my devices every year o 6 month depending on my time to do it.
I’m desesperate about this issue, i’ve purchased a 1200 VA UPS to discard possible power failures and no UPS disconnections has been informed in the UPS Software since first of August.
In my opinión, my last home (when i first changed my MB, CPU and RAM) was suffering a lot of power disconnections because it was a poor neighborhood, then i think my Processor is the problem, it maybe result damaged on one of those multiple power loss with a peak voltage, but i’ve tested it with PC Benchmark and PCMark and no problem was found on the CPU.
Thanks for you time, Hope you can find some way or explanation.
PS: In case not, i’m thinking to sell this computer and purchase a Brand new one. 5 years of a problem persistance is enough xD
Robert,