As part of its '10 reasons to upgrade' series, Microsoft's latest ad is all about convincing you that Windows 10 is Microsoft's most secure OS to date. The video also goes over SmartScreen, Microsoft's built-in solution to protect users from accessing harmful sites, mirroring the function of browser extensions used by antivirus software. Last of all is the star feature, Windows Hello. It's Microsoft's attempt to create an authentication platform for the future, with support for fingerprint, facial and even iris scanning, allowing authentication to not only be far more accurate than a password but also less cumbersome. This is certainly a useful feature and it looks like multiple devices are soon going to support it.