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Windows 10, Microsoft’s new operating system, launches July 29. The biggest difference between it and older versions of Windows? It’s a totally free upgrade — provided you have Windows already installed on your computer.

That’s a big change for Microsoft, which could traditionally count on big sales of its latest operating systems. It’s also a shift that’s emblematic of larger changes at the company under CEO Satya Nadella, who’s moving many of Microsoft’s software products to subscription-based sales models.

For more about Microsoft’s Windows 10, watch the Tech Time video above.

Read next: Microsoft Is Using Cute Babies to Sell Windows 10

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Write to Arpita Aneja at arpita.aneja@time.com.

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