CCleaner

We recommend using CCleaner once a week to keep your computer working quickly.

CCleaner is a freeware system optimization, privacy and cleaning tool. It removes unused files from your system allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. Additionally, it contains a fully featured registry cleaner. 

HOW TO USE- To clean temporary files etc., click on RUN CLEANER, in the bottom right hand corner.