The latest count includes Xbox One users, who started receiving a Windows 10-based update in November.

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Microsoft’s Windows 10 is running on 200 million personal computers and other devices, the company says.

Adoption of the new operating system, launched at the end of July, is the fastest of any version of Windows in the Redmond company’s history, Windows marketing chief Yusuf Mehdi said in a blog post Monday announcing the figure.

Microsoft has tried to speed that uptake by offering the software as a free update for most nonbusiness users of Windows 8.1 and Windows 7, the two previous versions, which account for most Windows users.

The latest tally is boosted by the inclusion of the Xbox One. Users of the latest version of Microsoft’s video-game console started receiving a Windows 10-based update in November. The count also includes the first smartphones to run the operating system.

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Before the availability of smartphone or Xbox variants of the software, Microsoft in early October said 110 million devices were running Windows 10.