Windows 8.1 gets a bad reputation as a tablet OS in spite of all the work Microsoft has put into it. While it's true that it's quite a stretch to build a platform that covers all possible computing forms, Windows 8.1 has some nice features that leaves Android behind....
...The evolution of Windows
Windows 8.1 isn't for everyone but it's coming along nicely. It's not strictly a mobile OS but it's evolving into a decent one. The advantages discussed here are not the only ones over Android, but they are big enough to make a difference.
Some may feel that the availability of Microsoft Office on Windows 8.1 is a big advantage over Android and wonder why it's not on this short list. While the absence of Office on Android is a disadvantage over Windows for some, it's not for the millions of current Android users and thus is not discussed here.
Android makes more sense for some mobile users as it's a robust platform for tablets and phones. It's now making its way onto the desktop, too. Those wanting a pure mobile UX can do well with Android.
Windows is a better mobile OS than some realize, and it would be a mistake to overlook it. Mobile devices of all types are now available with Windows 8.1, and that alone could be an advantage for some over Android.
Read more at: 4 advantages Windows 8.1 has over Android in mobile | ZDNet