The following are some of the most common activation errors with possible solutions for Windows 10. If you're getting an error code that isn't listed on this page, contact customer support.

Learn how to use the Activation troubleshooter to resolve common activation issues in Windows.

Run the Windows 10 Activation Troubleshooter: select Start > Settings > Update & Security > Activation and then select Troubleshoot. Check if you have a paper copy of your Windows 25-character product …

Learn how to activate Windows using a product key or digital license, check your activation status, and link your Microsoft account.

Windows 10 should automatically activate unless you made significant hardware changes (such as replacing the motherboard). For additional troubleshooting steps, please see Get help with Windows …

Provides several workarounds to the Windows activation or validation error code 0x8004FE33 when you connect to the Internet through a proxy server that uses Basic authentication.

Describes a problem in which you receive an error message when you try to use the Windows Activation wizard to activate a copy of Windows Vista or Windows 7. Resolutions are provided.

Learn how to troubleshoot and resolve 'Windows can't be activated' error message.

Learn how to troubleshoot and resolve 'Windows can't be activated' error message.

If you make significant hardware changes on your device, such as replacing your motherboard, Windows will no longer find a license that matches your device, and you’ll need to reactivate …