: Go to Settings > System > Activation and select "Change product key" to enter a valid 25-character code. Why Avoid Third-Party Activators?
For official support, you can visit the Microsoft Activation Help Page or consult the Microsoft Q&A community for troubleshooting specific activation errors. : Go to Settings > System > Activation
: Using unauthorized activation tools may violate Microsoft’s terms of service and software licensing agreements. : Go to Settings > System > Activation