A seeming problem with Microsoft's Windows activation servers wich caused a number of Windows 10 users to see false messages informing them they were running non-activated software. At the end of the day (U.S. Eastern time) on November 8, some users were reporting these issues were resolved. On November 8, a number of users who had activated and licensed copies of Windows 10 Pro began receiving messages saying they needed to install Windows 10 Home or go back and purchase a "genuine" copy of Windows. This included both Windows Insider testers and those builds released to mainstream users (including some users with the Windows 10 October 2018 update/1809). Some users said they had contacted Microsoft support and were told incorrectly they needed to repurchase licenses or somehow obtain new product keys. (And some people said they did this.) Some users also said they followed the instructions they received in the erroneous messages and rolled back to Windows 10 Home. Meanwhile, Microsoft officials said very little officially about what was happening. In the afternoon (ET) of November 8, after asking Microsoft for an update on the situation, I got the following message from a spokesperson: read more on our Forum

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. Microsoft has since acknowledged an ongoing issue with its activation servers, which is causing systems to falsely report this information, commenting that the problem should be fixed within a couple of days. Microsoft also says that the Windows activation troubleshooter may report that you have a Home license, but users are advised to ignore this message and wait for the problem to be resolved on Microsoft's side. Windows should reactivate as normal, assuming your key or digital license was genuine before all this happened. Microsoft has not yet commented officially on any of its Twitter accounts that it has been fixed, despite 27 pages and counting of complaints on its Community forums post. Visit OUR FORUM for further details.