Elwood,
I am sorry to hear that you are unable to activate AVG PC TuneUp product in your PC. Please try to activate AVG PC TuneUp as per the steps mentioned here . If you face any issue with the activation, please share the screenshot of AVG PC TuneUp window to assist further.
I have also sent an follow up email to receive the screenshot of AVG My Account webpage. Please reply to that email with required screenshots to escalate accordingly.