I can give you a more tailored fix once I know more about your setup!
Here are some potential solutions to fix the AirMyPC registration key issue: airmypc registration key fix
If you don’t need 24/7 unattended access, the free version might suffice. I can give you a more tailored fix
: AirMyPC requires an active internet connection for a one-time activation when you first insert the key. If you are offline, the key will fail to validate. the key will fail to validate.