Shadow Defender can run your system safely in a virtual environment called 'Shadow Mode'.'Shadow Mode' redirects each system change to a virtual environment with no change to your real environment. If you experience malicious activities and/or unwanted changes, perform a reboot to restore your system back to its original state, as if nothing happened. With Shadow Defender, you have the flexibility to specify which files and folders are permanently saved to the real environment. This ensures important files and folders are kept after a reboot and files your do not want, can not be kept. The Shadow environment can prevent all viruses and malware as well as protect your privacy. if something bad does happen, just reboot your machine into it's original state. Main Advantages. 1. Maintain a system free from malicious activities and unwanted changes.2. Test software and game installations in a safe environment.3. Protect against unwanted changes by shared users (suitable for workplaces and educational institutions).This is a 30 day trial version, but for $35 you can purchase the unlimited lifetime license with free product updates.