I too salute to CCleaner. After a clean, and a reboot, defrag, my lappy runs as smooth as butter. Another healthy alternative is Pc Doc Pro.
I occasionally every few weeks make a BACKUP of my registry. If your like me, and play with your registry, or just someone trying a few registry hacks, and not too confident....backing up is the way to go.
I also think that microsoft should scrap their default defrag program, and come up with something thats more efficient. I myself use PerfectDisk to defrag my hard drive once a fortnight.
Be good to your PC, and your PC will be good to you.
