I have been using the following two programs for years now. Zero problems and my computer runs like day one. I have had my computer for 8 years now and it is extremely fast.
Just get CC Cleaner which is free.
http://www.piriform.com/ccleaner
and
Advance System Care. It will be the best $18 you ever spent.
http://download.cnet.com/Advanced-SystemCare-Free/3000-2086_4-10407614.html
I use CCleaner, and keep it updated, and I like it, but it was attacked by the "autosweep" program that this virus installed.
It took me three reloads from backup before I figured it out.