I hooked an LCD monitor that i use for xbox, tv, and the computer. On windows XP if i switch user accounts sometimes it will say "VGA mode not supported". VGA is the input i use for the computer. I called the tv company and all they seemed to try to do was convince me that it wasn't the tv(typical). Any ideas why this happens? Doesn't happen always but when it does i have to reboot which isn't healthy...