Use your computer to browse the Internet, download files and test new software and you'll be surprised to find all sorts of miscellaneous and unwanted data left across your computer. Some of these files can cause your system to start more slowly and it's worth keeping your system cleansed as it will speed up the machine, plus will free up space. CCleaner is one of the best free system cleansing tools that will clear a lot of the junk from your computer. It will even scan and optimise your Registry.28 Aug 2009