Windows installed fine just every now and then froze it got worse in that it froze on startup so i installed Ubuntu the plan oridgonaly was dual boot and see if i could fix windows but Ubuntu would only do a complete install i assumed that it just couldn't see windows so agreed any way and did a complete Ubuntu install the same problems of freezing up occurred which led me to realize it was a hardware problem....so here we are will post back after the ram arrives, should be Monday..Although from what you're saying it could be that the power supply isnt good enough for the GPU so from there it would be a choice of changing power supply or the GPU... mmmmm 512 is a good amount of vid processing power have to look at the cost of changing them. cheers anyway Burr I'll keep you posted