Hello,
Make sure your product key is valid and doesn't been used on other system.
Do you purchase the product key from an authorized retailer?
Or you can try to activate the system by phone.
- Select Start > Settings > System > Activation.
- Under Activate Windows Nowsection, select Activate by Phone
Windows Client for IT Pros and Windows Server forums are moving to Microsoft Q&A
We’re transitioning to Microsoft Q&A for a more streamlined experience. Starting February 26th*, new questions can only be posted on* Microsoft Q&A. Existing discussions will remain accessible here.
Beginning March 3rdcustomers looking for support on Answers will be automatically redirected to Microsoft Q&A.
Have a nice day.
Best Regards,
Hania