Windows XP is continually updating weekly with the requirements to restart. The problem is that my XPS 710 will not ever power up after shut down unless I unplug it and wait 30 minutes before plugging it back in. If I try to power up in less than 30 minutes I get a yellow LED on the start up button and nothing happens. It is really annoying that I cannot power off this computer and restart it right away. Any ideas other than tossing it in the trash can or daily having to wait a half hour to use my computer???? I have had Dell technicians out and they have no idea of why this happens.