The most common cause is an Xbox Live service disruption, though local network issues or account authentication problems may also trigger it. Now that you know the causes, let’s discuss the solutions.
1. Use the Windows Activation Troubleshooter
If you’ve made major hardware changes (like replacing your motherboard) or reinstalled Windows, the built-in Activation Troubleshooter can help reactivate Windows 11 or 10. Make sure you’re signed in as an administrator to use this tool.
2. Try Activating Windows Again Using Your Product Key
If you still have your product key, you can try using it again to activate Windows 11. This method will work as long as you haven’t changed significant hardware, like the hard drive or motherboard. Follow these steps: If the product key is correct and valid, your PC will be activated right away. If your product key doesn’t work, or you recently changed your hard drive or motherboard, this method may not succeed—a digital license linked to your Microsoft account might help. In that case, log in to your Microsoft account and wait a few hours. Windows will check for any digital licenses tied to your account and try to activate your PC automatically. If you need help changing your Windows 10 product key, visit How to Change Your Windows 10 Product Key
2.1. Use Command Prompt to Activate Windows
2.2. Activate Windows by Phone
You can also activate Windows by phone by contacting Microsoft Support. Here’s how:
4. Run Microsoft Support and Recovery Assistant
Users on Windows 11/10 can use the Microsoft Support & Recovery Assistant to automatically find and fix activation issues. Since this tool is official from Microsoft, you don’t need to worry about its safety. Here’s how to download, install, and use it: If none of these methods solve the Windows activation error 0x87e107f9, there might be a serious problem with your license or an issue with Microsoft’s activation servers, especially after major hardware changes like swapping your motherboard. Windows licenses are usually linked to your hardware, so changes can affect activation. If you’re still stuck, a Microsoft support agent can help find the cause and may be able to solve the issue remotely. Visit the official Microsoft support website to get in touch with their team for further assistance.
