I discovered the screen res on my Dell Dimension 2400 running xp/sp2 suddenly was altered to CGI quality 640x480 with 4 bit color. This did not occur after a reboot - I generally leave my pc on all the time - it sits behind a firewalled router on broadband. My mcAfee anti-virus is current and I ran hijack-this and found nothing unusual. I have other pc's hitched to the home network and none have this problem. I know it is not the video card because I have a dual boot to win2003 server on the same box but it does not have that problem. Stumped. At the point of reinstalling xp. Ideas????