It appears that Windows 10 installations have gone stagnant. Back in March, former Windows chief Terry Myerson announced the OS was on nearly 700 million devices, but months later, that number hasn’t changed: Satya Nadella held an earnings call this week and reiterated W10 being installed on “nearly 700 million” devices. We've been at nearly 700 million devices for almost four months, so growth of the OS install base is either completely stagnant, or Microsoft has been very loose with the word "nearly". When Windows 10 was first introduced, Microsoft said that it planned to have the OS installed on over a billion devices within two to three years. The company retracted that promise a year later, saying that it won't achieve the goal, but the three years will be up in 10 days.