ta, the tune up utilities, has a lot of features just to keep your computer running smooth, for example when I changed my pc into a mac, a lot of files etc got moved and my computer generally slowed down, but it has its own defrag utility, probably better than the windows one I'd say, and now my computers fast again, it also finds problems in registry and corrects them, it also deletes old registry entrys, it can check for errors in the hard disk and fix them, it's awesome, and say you have a crap pc, you can make it automatically enhance it so it runs faster, i.e. disable animations and shadow icons etc
