well my computer has started crahing again. thougt i had soved it llast week when i reseated the ram. but nope. it never crashes in games but if i am browsing the internet, have itunes, msn open anything like that it locks up. the display still works but wont change and i can move the mouse arond but if i click on anything i loose that too. the keyboard wont work and everything is bodged. i have to turn it off at the front. btw is it safer to hold down the power button or press the reset button? thanks