Screen Freeze forcing reset

[Guest]

Hi
I upgraded to windows vista and the first thing that it complained about was
my ATI graphics drivers - which I updated. I have a motherboard with an ATI
Xpress200 controller and a saphire x1950 graphics card. I installed ATIs
control center for my card and windows seemed happy. However, consistantly my
screen will freeze allowing no input of any kind. My machine is still up and
running - though maybe in standby - but I can't get any response. I have to
reset the machine each time. My machine has 2GB of ram and my performance
rating (for running vista) is 4.3.
Any ideas would be much appreciated.

 

[Guest]

This seems to be the exact same problem reported about RC1 by Marc last year.
I have tried reformatting my drive, installing XP (with no additional
software/drivers), then upgrading to Vista. Once upgraded I installed the
graphics drivers and windows updates. There's no usb devices attached, no
printers installed, no bluetooth. But the system still freezes periodically -
doesn't usually last more than 15-20 minutes.

Ian