With this tool, you can safely browse the internet, download and install any software for testing, or tweak your system. As all these are done on a theoretical virtual layer, all will be automatically erased up on the next reboot.
Softpedia in association with Returnil offers you Returnil System Safe Pro for free one year license. In order to get the full version of Returnil System Safe Pro, simply access this page. You can download the product from here.