How to Fix Windows Activation Error Code 0xC004C008

How to Fix Windows Activation Error Code 0xC004C008

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Windows Activation Error Code 0xC004C008 usually occurs when the activation key you're using has already been used on another device, or has exceeded the number of allowable activations. This often happens when transferring a Windows license from an old machine without proper deactivation.

To fix the issue, first confirm you're using a valid and eligible product key. If the key was transferred from a previous installation, make sure that installation has been deactivated. You can then try activating by phone. Press Win + R, type slui 4, and follow the on-screen instructions. Provide the installation ID and request a confirmation ID from Microsoft to complete activation.

If you’re still facing the error, it may help to contact Microsoft Support directly and explain the license transfer. They can assist in reactivating the key if it qualifies under the license terms. Alternatively, you may need to purchase a new retail key if the existing one is no longer valid.

A complete step-by-step guide is available at WinChatSupport, which outlines all recommended methods to resolve this error.

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