Hi Andrew,
I'm here to help. Error 0xC004C060 can occur if you entered a product key that can no longer be used to activate Windows, upgraded to Windows 10 but the activation servers were busy, or if you upgraded to Windows 10 using the free upgrade offer but Windows 10 isn't activated after a reinstall. As initial troubleshooting, I suggest that you run the Activation troubleshooter. This resolves most activation errors. To use the troubleshooter, go to Start > Settings > Update & Security > Activation, and then select Troubleshoot.
If the issue still persists even after using the troubleshooter, it is best to get in touch with our Answer Desk team to have this issue sorted out. They can check the product key you have to ensure that it can be used to activate Windows 10 Pro. You may contact our Answer Desk team via call or chat here.
Keep us in the loop.