Tip: We can't activate Windows on this device because the product key was already used on another device. If you think it wasn't used on another device, select Troubleshoot below. Error code: OxC004C008.
Oh Dear!
I was not able to validate your installation ID. Please have the Activation window up on your computer screen, so you can have this number handy. The representative will need this number to help with activating your product.