After the bios update in the activation page on settings it showed me the 0x803f700f error.
After clicking troubleshoot and then selecting "I have changed my hardware recently" it would
come up with an error about contacting the activation servers.
I just got it working after talking with microsoft support by:
- Opening up the Microsoft Store from the computer.
- Logging in (or logging out and then in again - in my case I was not logged in the store after the bios update).
- Restarting the pc.
- Run the troubleshooting again for the activation and clicking on the I recently made a hardware change prompt.
It worked after that and the activation run smoothly.