Microsoft has tempered its bullishness concerning the pace of the Windows 10 rollout over its first few years in the wild. While the tech giant originally predicted at Build 2015 that Windows 10 would be on 1 billion devices by mid-2018, the company is unlikely to hit that target.

Windows 10 will miss mid-2018 one billion install target, Microsoft says

Speaking to ZDNet's Mary Jo Foley, Microsoft stated:

"Windows 10 is off to the hottest start in history with over 350M monthly active devices, with record customer satisfaction and engagement. We're pleased with our progress to date, but due to the focusing of our phone hardware business, it will take longer than FY18 for us to reach our goal of 1 billion monthly active devices. In the year ahead, we are excited about usage growth coming from commercial deployments and new devices - and increasing customer delight with Windows."

That target was expected to be carried to fruition on the back of not only PC installs, but also Xbox, IoT devices and Windows Phones with Windows 10 Mobile. However, as Microsoft notes, the revised expectations are due to the company's current struggles in the mobile space, which seem to have set the timeline back further.

In any case, with the free Windows 10 upgrade for PC users set to end on July 29, it's likely that momentum will slow further. However, 350 million active devices in the year since Windows 10's launch is definitely nothing to scoff at, and it will be interesting to watch as the company makes progress towards the self-imposed goal.