Use Microsoft’s sign-in helper tool first. It checks the email address or phone number tied to the Microsoft account and tells what action is needed if it detects an account problem.
If help from a person is still needed, go to Contact Microsoft Support, enter the problem, select Get Help, and then select Contact Support to be routed to the best support option.
Important: Microsoft support agents are not allowed to send password reset links or access and change account details.
If the issue is Windows activation after reinstalling Windows 11:
- Open Start > Settings > System > Activation.
- If there is no digital license, select Change Product Key and enter the same Windows 11 product key used before the hardware change or reinstall.
- If there is no product key or digital license, select Go to Store from Activation to purchase a Windows 11 digital license.
- If activation still fails, contact customer support.