I just got a new computer and installed winXP on it, but when I try to shut down it just hangs after the "windows is shutting down" prompt, goes to a blank blue screen and nothign short of a reset will get it to respond. Pulling out the power cable trips the power for the building at night coz more stuff is on. Reboot from the OS works fine (most of the time). Mobo is intel d856PERL. help!