You have a Windows 10 product key, but during activation, you encountered error 0xC004C020. What is the cause, and how can you resolve this issue? The reason is that the activation server has determined that this key has already been activated on another computer. If you previously purchased this key, you need to contact your seller to resolve the situation. If you don’t have a key, you can purchase Windows 10 at the lowest prices in our online store. Learn more on the following page.
Windows 10 Pro – 10.4 €
Windows 10 Home – 10.2 €
Windows 10 Enterprise – 12 €
Windows 10 Education – 9.16 €
