Computer does not perform a real shutdown or restart

Hello,

when I am using SecureBoot and UEFI, my computer cannot be restarted or shutdown. If I try to restart the computer, it goes into a kind of suspend mode. For switching it off correctly, the power button must be held down for a long time.

Only if I switch off the SecureBoot in the BIOS the computer behaves normally.

I am using Windows 10 (64bit) 1607 LTSB.

The BIOS Version is: 00.02.71 Rev.A

Best regards

CentusX