There's not anything evil running on the computer, either a process of my own making or Norton, et al. The CPU isn't even all that utilized, really. I'm getting the grinding when doing stuff as simple as scrolling in the browser, which ought to be all memory-related. I don't think an fsck would make a difference, but I'll give it a shot.

However, I am running a little low on drive space. What difference would that make?