If you can not get Windows 10 activated successfully, there should be particular errors shown on the screen. In this topic, I will give tip to fix 0xC004C008, a common windows 10 activation error.
What causes error 0xC004C008 during Windows 10 activation process?
According to Microsoft, there should be a clear reason which explains why you see the this error:
That the effected Windows 10 product key might have been used on multiple PCs cause this 0xC004C008 problem.
In other words, the product key was used already in other PCs.
How to get rid of 0xC004C008 problem?
You can find how to use a free activator tool to get Windows 10 activated successfully without product key in our another topic: How to get Windows 10 for free.
Otherwise, follow the coming solution:
Obviously, all above works on Windows 8 and Windows 8.1.
Mac users might want to take a look on: