I have just recently downgraded from vista home premium to Windows Xp Professional SP1. My computer is a Emachine w3653a with an Intel Celeron CPU E1200 @ 1.60ghz. In the device manager it says i don't haver drivers for a PCI device, PCI Simple communications controler, SM bus controller, Video controller (VGA Compatible) I am currently connected to the internet but i have no sound or graphics. Any help?