MSI 8800 Ultra stops working

On the 9th of Feb, during a day of average PC usage, everything locked up and stopped working. After a fruitless evening, I discovered it was my 8800 that was playing up. When I start something graphics intensive my PC locks up, forcing a manual restart. Tried multiple different things, all ending up the same.
Also, sometimes when something loads, there are red dots that appear all ver the screen, which either disappear or make me have to restart.

Is this an OC edition or are you overclocking the card.  Do as Bosskiller suggests.  Also, check to see that the fan isn't clogged with dust--check your case for the need for cleaning.

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    http://forums.hexus.net/showthread.php?t=110912
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    Quote from: voltageme5 on 15-September-07, 04:53:58
    Hey guys,
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    Sorry, was in a hurry to post and jumped the gun.
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