I have a computer that won't shutdown when I shutdown in Windows. When I go to the start menu > shutdown > shutdown, the computer acts like it restarts instead of shutting down. Is this a power supply problem? Or could it be a Windows problem? Power switch? I am having to "shutdown" and wait for Windows to shutdown, then flip the main switch on the back of the tower before it tries to boot back up... really annoying.

BlackHatHunter