Harper said:Never had that as problem with that is all 8 years of working in the computer industry.
Well, I'm sure you;ve never encountered someone whos done it. I have.
Did you check the direction of your reset and power switch? It may also be the physical switch on your case. I am having the EXACT same problem. I just never turn off my computer, simple work around. I know thats not what you want to do though. Try this. Find the pins on your mobo that you switch is plugged into, and using a small flathead screwdriver, and the utmost of caution. jump the two to start up the computer. Now shut it down with the switch not hooked up. Does it turn off? If it does, you have eliminated hardware as your possible problem, and boiled it down to your switch.
http://techist.com/showthread.php?threadid=41129&highlight=computer+turn+off
that was the thread I started for the same problem.