Hi all. I have a MacBook Pro that's a couple of years old. I'm running 10.5.6 on a 2.16 GHz Core 2 with 2 GB of RAM. As of late I've been noticed some very poor performance, specifically a lot of lag and sluggishness. This manifests itself in a few ways. I notice when I'm playing music through iTunes or streaming sites that it gets very choppy. My mouse tends to lag at times and I also notice it when using Expose (the windows don't move smoothly). I've also had a couple of system crashes lately which I rarely had previous to the last couple of months. I've searched some forums and tried some of the fixes (e.g., repairing disk permissions) but these things haven't helped. It's possible that I just need to up my hardware although when I check Activity Monitor I sometimes, but don't always, see the CPU spiked when I'm noticing problems. Are there any steps I can take to diagnose what's going on here and potentially fix this?