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​Microsoft Windows 10 is now on 300 million screens

Don't forget, the deadline to upgrade for free is coming soon.

Sarah Tew/CNET

Windows 10 has been a critical success, and it looks like a lot of people are upgrading, too. After a six-month check-in, at which point 200 million active devices had upgraded, Microsoft announced Thursday that the number's now up to 300 million devices worldwide. That tally includes PCs, phones, and also the Xbox One.

In a blog post this morning, Microsoft also listed some new stats on Windows 10 usage. For instance, the minutes expended on Edge browsing are up considerably, and Cortana has been one busy personal assistant.

Windows 10, which has been out for about nine months at this point, is available as a free upgrade to existing users of Windows 7 or later, but that won't be the case forever. After July 29, a new copy of Windows 10 Home will cost $119, though if you plunk down cash for a new machine, you'll get it at no extra charge. In other words, if you've got a Windows machine lying around, upgrade time is now.

For the time being, according to ZDNet's Mary Jo Foley, it's still not clear whether Microsoft might renew the free upgrade offer.