hi all. my computer is, acer aspire x1300 amd phenom (tm) 9650 quad core processor (4cpu,s) 2.30gz 3gb of ram nvidia geforce 9200. windows vista premium. i hav had my computer for 2 months now and hav a problem while playing on world of warcraft, where my screen goes blank at random times and i cant move the mouse or press anything to get it going so i hav to hard boot the computer. sometimes it goes black and sometimes white just wondering if any1 could help me whith this problem as ive tried everything i no which aint alot but driving me mad now . thnx .