Same as emmettleffel, I use WinOptimizer Platinum 3. Mostly use the defrag, it's excellent
They (Ashampoo) do loads of utilities + they're very good by all accounts, but the WinOptimizer has quite a few utilities all included in the one package, so it's quite neat, in more ways than one
PS Only thing I don't like about Ashampoo is that I get LOADS of junk email from them so, if you go for their stuff, be sure to say 'No' to junk mail from them!