Note: This requires you to have a valid digital license linked to your Microsoft account.
If none of these steps work, the activation servers may be temporarily unavailable ; wait 24 hours before trying again, or contact Microsoft Support directly for a manual override. Get help with Windows activation errors - Microsoft Support
Comprehensive Guide to Fixing Windows Activation Error 0x87e10bc6
slmgr /rearm
If your network is misconfigured, it might block the activation signal.
Search for , right-click it, and select Run as Administrator .