Hi all, I have been having a problem where my MB completely locks up, as in the screen freezes and no input device will do anything and I have to turn the power off and back on to restart it. This seems to happen when I play a game, Football Manager 09 mainly, but recently the screensaver can trigger it, ie. it just stops working at random times. I have tried the repairing permissions on the disk utility and performed all the relevant system checks, but this has not solved the problem. I have ruled everything out and it's rather annoying as I no longer trust the machine not to crash. I have come to the conclusion that I think it's the graphics card although cannot find any updated drivers unfortunately. Has anybody else had this problem at all and if so, what did you do about it? P.S. I have experienced the 'kernel' error in the past too, where the grey screen appears and says I need to turn the computer off. Hope this is fixed in SL!