Hello all. I hope that you can help with an error that has been causing me no end of frustration. I recently purchased all the components for a new machine from a retailer here in the UK and have been plagued by this problem since I assembled it. Windows XP Pro will install correctly, albeit with 7F non-critical error upon the first time that Windows loads (sorted out by installing the proper drivers). However, whenever I attempt to launch a game the screen will reset (as if launching the game) and then the PC will reset itself. My retailer has had the core components back and insists that they are all working fine. I myself have run Prime95, Memtest86 and 3DMark to try to find out a source of the problem and everything has run correctly. The machine boots like the wind and I am not experiencing anything like data corruption. No BSOD is appearing (despite me turning off the automatic reboot) and I no obvious errors are appearing in the error logs. The machine is currently with a completely different retailer for testing and analysis as I was highly unsatisfied with the supposed tests done the first time, but they are having as much joy as myself for finding out what the problem is. I myself attempted running things with the latest drivers and the stock drivers delivered on CD with the components. No joy there. Could anyone suggest what the problem might be?