The Independent
"If your system has slowed to a crawl, don't despair, download CCleaner, a fantastic PC decrapifier and give your machine a quick spring clean. Able to identify and clean stray files, cookies and other accumulated digital detritus, CCleaner can make a huge difference and best of all, its a freebie."

Read the full review at:
http://www.independent.co.uk/life-style/gadgets-and-tech/features/useful-free-software-to-fire-up-your-pc-931532.html