Go out and buy a new Windows 7 based PC and you’ll soon be installing and testing new software. We all do it. Problem is, after a while installing and removing software will leave all sorts of unnecessary information all over your PC. You need third-party cleansing tools to remove the mess.

Ashampoo WinOptimizer 2010 Advanced is our current free full product, worth £35. Better still, it’s Windows 7 compatible, so you can download and use this app to optimise your machine, cleanse your drive and much more. It’s available to download from your software store.