Hi, for me the thing that causes this is the Bluetooth-device. Disabling it in Device Manager makes Windows go back to 10 s shutdown, as before 8.1.
In my case the device is Qualcomm Atheros AR3012 Bluetooth 4.0 + HS. Maybe new device drivers will solve the problem.
BINGO!!! THANKS <Tess82e> --No more long shutdown after the 8.1 store upgrade on my P27K Gigabyte laptop with a Killer 1202 Wi-Fi card. Right clicked on the Qualcomm AR3012 Bluetooth adaptor in device manager and clicked on "Update Driver Software". 8.1
replaced the Qualcomm driver with a Microsoft generic driver and now I have 14 second shutdowns instead of 5 minutes plus. Obviously Atheros needs to update their drivers.
I Am Still Wondering every time I push the start button though if 8.1 is going to boot up on the first cycle of the little spinning circle of dots and when it doesn't boot having to wait several minutes while it is going through its Automatic restart and
then you really have to watch it when that doesn't work because it next goes into its Automatic repair mode and when that doesn't work watch out because WINDOWS 8.1 CAN AUTOMATICALLY RESET THE OPERATING SYSTEM BACK TO WINDOWS 8 A CLEAN REINSTALL OF 8 with
nothing else there.
That happened to me! What a painful experience it was .... I almost wiped the drive and installed 7 Ultimate. But I imagine that should be a new thread which I don't know how to start....
THANKS MICROSOFT COMMUNITY---