Since then, Microsoft admitted that it is due to activationserverThe problem caused the system to report this message incorrectly and commented that the issue will be fixed within a few days. Microsoft said
Microsoft has released the latest announcement on recent professional activation issues. This problem has appeared in many countries and regions such as Japan, South Korea, and the United States. We are very sorry to inform you that this is due to Microsoft activation server issues, partWindowsThe user may be unable to activate.
A Microsoft engineer told the system that the system was disabled, which was caused by a bug encountered on the company's activation server, and everything should be back to normal within a few hours. The failure seems to affect Windows 10 version 1809 and version 1803, and most users said they upgraded from Windows 7 or 8.1 during the 2015 free upgrade event.
Update: Microsoft seems to have solved the problem of activating the server. Users on Twitter reported that they have been able to reactivate Windows 10 Professional Edition, and the foreign media NeoWin was successfully activated after the test.
Users need to perform the following steps to reactivate Windows:
Go to the Settings app (you can do it via Action Center > or Windows +i)
Go to Update & Security > Activate
Click the link for the troubleshooter.