Microsoft on Monday took another shot at clarifying its Windows 10 upgrade policy, telling Windows Insider participants that they had to remain in the preview program if they had not upgraded from an eligible PC but wanted to continue running the OS free of charge.

Monday’s update was the third or fourth time, depending on how one counted, that the company attempted to kill the confusion it started Friday.

“Let me start by restating very clearly that Windows 10, whether you get it on 7/29 or whether you got it in a preview form through the Windows Insider Program, is intended to be installed on [a] Genuine Windows device,” said Gabriel Aul, engineering general manager for Microsoft’s operating system group, in a revised blog. “Genuine” is Microsoft lingo for a legitimate Windows license that has been activated with a product key.

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