I agree with Ben...defragging is a good idea. Also, if you have low disk space, consider deleting all the files in your temp folder (c:\documents and settings\[username]\Local Settings\temp) and emptying your recycle bin before performing the defrag.
Oh, and one more thing...you mentioned that you're on a laptop. Are you running on AC or battery power? I imagine you'd see better performance if you're plugged in.
