Microsoft Windows 10 on 75 Million Devices in First Month

Microsoft Corp.’s Windows 10 has reached more than 75 million devices in almost a month since the operating system was released, according to Yusuf Mehdi, the company’s marketing chief for Windows and devices.

More than 90,000 personal-computer and tablet models have upgraded to the new OS, which is running in 192 countries, Mehdi said Wednesday in a series of tweets. The app store for Windows 10 has had six times more downloads per device than Windows 8, he wrote.