If you're unable to activate Windows 10, the Activation troubleshooter could help. To use the troubleshooter, select the Start button, select Settings > Update & security > Activation , and then select Troubleshoot. You must be an administrator to use this option.
The Troubleshoot option is available only if your copy of Windows 10 (Version 1607 or later) isn't activated.
The following are some problems that the troubleshooter may fix:
Article ID: 20527 - Last Review: Aug 31, 2016 - Revision: 23