Shadow Defender is an easy-to-use security solution (for Windows operating systems) that protects your PC/laptop real environment against malicious activity and unwanted changes. Shadow Defender can run your system 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 activity and/or unwanted changes, perform a reboot to restore your system back to its original state, as if nothing happened.