running 10.5.6 2.16GHz C1D 1GB Ram (currently) 100GB HD (~21GB free) I did a clean install around Christmas time, and then around 2 months ago I put in a second 1GB stick from Crucial. After a month of that being it it started randomly shutting down and getting progressively worse til it got to the point that it would just continually restart. So I yanked that new ram out and it started working normally again. (I'm going to try and get a return on warranty in the next week or two on the RAM). Now, I can't play a fucking song in iTunes without it randomly "freezing" for about 5 seconds 3 times throughout it. VLC also gets a little skippy here and there, and overall it has just been running like shit. I've had this problem for the past 2 or three weeks I'd say, and it'll happen when the only programs I have open are Safari and iTunes (so it's not like I'm thrashing it with work) I don't do much on it, Safari, iTunes, Word and Powerpoint, it's fairly common for me to plug it into my TV and watching movies off an external HD. Any ideas? Here is a screen shot of the Activity Monitor when I have iTunes and Safari open (with the only tab in Safari being this post I'm typing... I still am under Apple Care but I wanted to go here first because there aren't any apple stores near me at school and it's hard for me to be without a computer for a week being a student.