hey all, any help urgently appreciated thanks: running Vista 64, Q9650 @3.33Ghz, 8Gb Ram, OS on 1 HD, Data on 2xHD in Raid 1. Windows update installed updates to the 2 x Radeon HD4780 cards yesterday and update didn't install properly. Machine crashed. Uninstalled/reinstalled 4 Radeon times. Worked, then crashed again. Now machine won't boot from HD or Windows CR Rom. Hangs at crcdisk. All internal connections fine. ANY IDEAS please? I need to work! thanks.