Hi ive recently been onto the device drivers forum and they suggested i try this forum now as ive exhausted everything on that forum! My problem is that 12mths ago i built my own pc with the help of an expert but ive never been able to use it! what happens is i can load up windows xp no problem really fast too (well was) but for some reason whatever i was doing the screen would just freeze for a split second then return to my windows screen saver and my programs have gone? this happens more when im playing games such as LMA Manager 2007 or Company of Heroes which are powerfull on the graffics card, tech spot said could be the card so i upgraded it but it still happens, ive spent more on having the pc checked by computer wizards than i did building it? none of them can find anything wrong with my motherboard, memory, graffics card etc, so tech spot said could be power supply but recommend i check the motherboard myself as it is more likely to be that pls help im not a computer wiz so any feedback please make its simple and plain english haha