http://www.osnews.com/story/30855/Some_Windows_10_Pro_licenses_are_mistakenly_deactivated
>Some Windows 10 users are having problems with their Pro licenses today, as users on the company's Community Forums and Reddit are reporting that their Windows 10 Pro systems are saying they are not activated, and telling users to install Windows 10 Home instead. Most of the reports appear to be coming from users who obtained the Windows 10 license thanks to the free upgrade path Microsoft offered back in 2015, suggesting that the issue is somehow related to it.
>According to some of the reports, while the system says that users have a Windows 10 Home license, the Microsoft Store link in the settings page blocks them from attempting to buy a Pro license.