Advanced SystemCare uses a one-click approach to clean, optimize, speed up, and protect your computer. Get rid of junk files, protect your privacy, clean your registry, undelete files, and more. Get it here.
Malwarebytes Anti-Malware is considered to be the next step in the detection and removal of malware. This is the BETA version. The latest stable version can be downloaded here.
Mozilla Firefox is a fast, free and Open Source web browser that provides you with a highly customizable interface with numerous third-party add-ons, as well as multiple Mozilla authored add-ons.