Using the Activation troubleshooter

Applies to: Windows 10

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow.

If you're unable to activate Windows 10, the Activation troubleshooter could help. To use the troubleshooter, select Start > Settings  > Update & Security  > Activation , and then select Troubleshoot .
Open Troubleshoot settings 

You must be signed in as an administrator to use this option. If you're not already an administrator, for more info, see Create a local user or administrator account in Windows 10. The Troubleshoot option is available only if your copy of Windows 10 (Version 1607 or later) isn't activated. Once you activate, the option disappears.

The following are some problems that the troubleshooter might fix. If you receive an error code and none of the steps below help, see Get help with Windows activation errors

For more info about activation, see Activate Windows 10. For help with your product key, see Find your Windows product key. If the troubleshooter is unable to fix your issue, contact support.