My PC hangs when I initiate a reboot from the Start Menu. I can shutdown but when I reboot it says it shutting down and the monitor goes black. The LED lights on the front stay lit and the fans keep spinning though. I have to manually reset to bring it back up. This recently started after I upgraded to Windows XP. Mind you, I also added a network card to apply updates. To rule out the card as being the problem I removed it and tried to reboot with the same failure. The PSU is 200W this system was factory configured by Gateway so I didn't think adding the card would affect power dispersion. I also reformatted the hard drive back to Windows 98 to see if it was OS related and the problem still ocurred. Is there anything I can due to find out what hardware may be causing the problem?