Hello guys,

My computer have encountered some power problem because sometimes it won't shut down. I know it's bad to unplug, so I'd leave it for the night and the next morning it would still stay "Logging off". Then I have no choice but to unplug and reboot.

by the way, i have installed windows 8 beta 64 biton my pc and it works perfect so far.

does anyone know what could be causing this? many thanks in advance.