Hi guys, previously had a GTX 275 installed in my rig but downgraded today to a HD 4850 for various reasons. Thought I would try my luck with the already installed windows, ran driver sweeper and cleared all of the old Nvidia stuff of there, rebooted, installed cat 10.2, restarted and everything seemed fine. Ran WOW for my girlfriend and within 1-2 mins it crashed to desktop and then I got a BSOD. Checked temps out and they are excellent as this particular card has an accelero fitted. Decided, what the hell I'll do a fresh install to make sure there are no driver conflicts, reinstalled, installed drivers and seemed fine. Went on internet and BANG another BSOD within a minute. Currently running in safe mode typing all this which is absolutely fine and no issue - any ideas on possible problems and how I can rectify this please?