For a motherboard change, the supported self-service path is:
- Make sure the device is online.
- Open Start > Settings > System > Troubleshoot on Windows 11.
- Run the Activation troubleshooter. This option is available only when Windows is not activated, and administrator sign-in is required.
- If the troubleshooter still cannot reactivate Windows after the hardware change, use Microsoft support.
To reach a real support agent, the available support paths in the provided guidance are:
- Open the Get Help app in Windows.
- Search for billing.
- Select Contact Support at the bottom.
- Continue through the prompts until chat with an agent in your browser appears.
If that path does not appear, another documented route is:
- Go to Microsoft support contact.
- In the search box, type agent support and run the search.
- Ignore the search results and select Contact Support at the bottom.
- Choose Windows and Technical Support.
- Confirm, then select Chat with a support agent in your web browser.
If the troubleshooter and activation steps have already failed after the motherboard replacement, Microsoft support is the next path called out for reactivation help.