Windows provides the most comprehensive security with Windows Defender, Firewall, and SmartScreen. One of the greatest things about Windows 10 is that it keeps getting better all the time. Updated security. So the best Windows ever always gives you the best experience possible. Even better, staying up to date is easy. Windows provides comprehensive security, including Windows Defender, Firewall, and SmartScreen Filter, plus a dashboard that shows you devise health and security. Always enabled free updates2 help keeps you current on security and for the supported lifetime of your device.