XP Dual Monitor Feature Disappeared & More


Oct 17, 2011
Hello,My dual monitor feature has worked great for 3 years with XP Pro. Then it just disappeared. I have done everything but fix it. Now, my computer works on the motherboard video, but when I plug any video card in (including PCI) the main video disappears from everything. It is Not in Hardware, not in System, only the added video card lights and shows up. The main video returns when the second card is removed. I tried Ultramon, only one shows, Restored a good windows backup, spent 3 days researching internet