Learn how to use SLMGR or Software Licensing Management Tool to Install, Uninstall, Activate, View, Extend Windows License.

The very first thing that you need to do when trying to fix activation error code 0xc004f063 is to run the automated Windows Activation Troubleshooter.

Windows remains functional without activation, but you'll be locked out of personalization and other non-essential features until it's addressed.