2.66 Ghz, running 4Gig ram. Installed Snow Leopard earlier in the week. Problem: I'm now having to wake the machine up by the power button. Bought machine this summer, has been running fine until yesterday when I got home from work I noticed it wouldn't wake from sleep. At first I blamed the kids for possibly shutting down the machine but they denied it. This morning when I went to use the machine it wouldn't wake up again. This time I know was the last to use it last night and the first to touch it this a.m. i.e. it's not the kids messing with it. I installed SL on Tues and haven't seen any odd symptoms until yesterday so I'm thinking it's not SL that immediately caused this condition? Any thoughts/help would be appreciated!