It sounds like a hardware problem.
or
You could try a clean install and see if that helps.
or
Try another Video card.
or
a power supply.
When something fails after doing nothing that would be
something to try. If you are still in warranty you may try that route.
I've had a video card do things like what you describe when it was
under a load not functioning properly.
I'd try a clean install 1st.
Robert
"PamDennis" <> wrote in message
news:C8541A47-5090-45E4-A378-...
> Tried it but still the same problem 
>
> Seems to be a Vista problem?
>
> "Robert Martin" wrote:
>
>> are you running this driver
>>
>> http://game.amd.com/us-en/drivers_ca...common-vista32
>>
>> which is Catalyst 7.12
>>
>> If you didn't install this then you don't have the latest.
>> Windoze update does not update this kind of driver.
>>
>>
>> Good Luck,
>>
>> Robert
>>
>>
>>
>> "PamDennis" <> wrote in message
>> news:A70A023F-87C5-4FE8-BFF3-...
>> >
>> > As far as I can tell the drivers have no new updates.
>> >
>> > I will do a cleaning tomorrow.
>> >
>> > If I get the problem and am quick enough to Alt & Tab to the desktop I
>> > do
>> > get a message that the display has quit working but has now recovered.
>> > Display Driver r300.
>> >
>> > Does that help at all?
>> >
>> >
>> > "Robert Martin" wrote:
>> >
>> >> Could be a overheating problem.
>> >> Maybe your cooling fans need some dusting off.
>> >>
>> >> Are you using ATI's drivers from ATI's website?
>> >>
>> >>
>> >>
>>