Still, it's clear that Microsoft saw the slowdown coming. While it originally planned to have a billion Windows 10 installs by 2018, it later revised that projection to sometime after next year. One thing's clear, if Microsoft wants to reach that goal soon, it'll need to figure out a way to bring the OS to even more devices. The company won't be able to stall its mobile strategy for much longer.

Click here to catch up on the latest news from Microsoft's Build 2017.