Troubleshoot Windows Activation Errors
If you’re having trouble activating Windows, follow these troubleshooting steps to resolve Windows activation errors.
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(0xC004C008) error code
If you see this error code please contact us, mention you are getting error code 0xC004C008 in your message so we know what needs fixing.
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(0xC004F050) error code
This error code means the key does not match or is incompatible with the edition of Windows already installed.
For OEM keys:
You will see this error code if you are trying to upgrade from Home to Pro, or if you are trying to use a Home key on a Pro or higher install.
(OEM keys do not support upgrades and are to be used during a fresh Windows install by a system builder).For retail keys:
You will see this error code if you are trying to use a Home key on a Pro or higher install. Also if you have an alternative edition installed, such as Home N, a standard Home key will not activate this alternative edition.Solutions:
The main solution to this error code is to perform a fresh Windows install, guides below.
Alternatively, use a different key that matches the already installed edition.Installation guides:
Windows 10
Windows 11 -
Windows update
Confirm your device is up to date by checking Windows Update and installing any available updates.
To check for updates, select Start  > Settings  > Windows Update > select Check for updates
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Activation troubleshooter
If you’re unable to activate Windows, the Activation troubleshooter could help.
To use the troubleshooter, select Start  > Settings  > System  > Activation > select Troubleshoot
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Internet connection
Make sure your computer is connected to the internet.
To check your network connection, select Start > Settings > Network & internet. The status of your network connection will appear at the top
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Restart your PC
Restart your PC and retry the activation.
To restart your PC, select Start > Power > RestartÂ
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Activate by phone (if available)
You may get the option to activate by phone.
To activate by phone, look in the Activate Windows Now section > select Activate by Phone