Returnil Virtual System enables you to run a temporary copy of your operating system in memory or from a disk cache partition, and automatically undo all changes made to your system partition once you reboot the computer. The program allows you to install and test new software or system configurations and then simply reboot to restore your original system. Any files that you want to save permanently while the protection is active, should be saved on a separate partition or drive - otherwise they will be lost after reboot. Returnil Virtual System can be activated from the system tray and requires a reboot in order to start protection mode. The program can also be used for temporary Internet privacy as all Internet traces are lost as well after rebooting the PC.