I recently purchased an ASUS K53E notebook. It runs windows 7 64bit home. 6Gb ram. Whenever I try and shut down, it does so and then immediately reboots. The power light only flickers breifly off before the reboot. I end up holding down the power button to turn it off eventually. Occassionally it will actually shut down, but not lately. Where should I start trying to find the culprit? I have searched and found little in the way of others with this problem.