I did a full reformat of my computer a few days ago. It feels pretty damn great, since everything is running smoothly (anyone want life insurance?). Reinstalling programs is a pain, but something I’d willingly go through periodically just to have a clean machine. Having 2 hard drives helps too, since I don’t have to backup my files in DVD-Rs, which is a hassle when you have about 50GB of files to back up.