Windows powers the broadest range of devices with cool designs like 2-in-1s, All-in-Ones, and ultraslim PCs from Microsoft and our partners. 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 device health and security.