I am struggling with this problem: I installed a new video card (PCI ATI Radeon 9000 64MB Video Card 4 dual monitors V35) to my Dell Dimension 3000, 2.8GHz, 512MB ram, 40GB HD but when I powered on, Windows could not start up. After several reboots the gave up and uninstalled the new card and booted up my computer, Windows started up just fine. Anyone has any clue on this problem? Please help.