SAPPHIRE X1560 Pro (ATI) issue with Vista

Hi - I have just put together a new system Asus M2N-E SLI Mother Board 2 gb Kingston Ram & X1650 Pro Garaphics. I then installed Vista Ultimate 64, no problem running on the generic video driver although I couldn't run Aero. Windows then updated the driver and now when I try to refresh my 'score' for aero the PC hangs and often the display goes blank. Sometimes also the system reboots and often the driver fails. I have tried updating drivers from ATI etc to no avail but have found many others on the net with the same problem .... no solutions though. Getting desparate now, many thanks - Nigel