Hello Marylu6
An error occurred with our activation server or licensing service. Please wait a few minutes and then try the following Windows 10 Pro License Recovery steps: Select the Start button, then select Settings > Update & security > Activation , and then select Troubleshoot to run the Activation troubleshooter.
When the troubleshooter is complete, select Go to Microsoft Store to launch the Microsoft Store app. If the Microsoft Store app shows there was a problem, select Try again. After a few minutes, you should see a message that thanking you for activating genuine Windows, followed by another message showing that Windows was activated.
also you can follow these steps
https://support.microsoft.com/en-us/help/20527/...
I hope it helps