I have a 2 GHz intel MBP with 1GB of ram, which is a little battered to say the least, and I've had it now for a long while, as I purchased it soon after the initial MBP release date back in 2006. Recently it keeps randomly going to sleep while I'm using it, and it has full battery or is plugged in, so it doesn't really make any sense to me! It wakes up fine but sometimes it just keeps going back to sleep. Does anyone have any ideas about what it could be? My mac has been running slower than usual of late, but it only has about 10GB of free disk space now, so I thought that that was kinda normal. I'm a bit concerned because I don't want my precious MBP to die on me! Thanks!