Greetings,
We're sorry for the inconvenience caused.
From your description, we assume that you have a older version of AVG AntiTracck installed in your computer. Hence, it's not accepting the new format of activation code.
Please uninstall the older AVG AntiTrack from the Control Panel > Programs & features. Then, use this link to download the latest version of AVG AntiTrack.
Let us know if the issue still persists after installing the latest version of AVG AntiTrack on your PC.
Greetings,
We're sorry for the inconvenience caused.
From your description, we assume that you have a older version of AVG AntiTracck installed in your computer. Hence, it's not accepting the new format of activation code.
Please uninstall the older AVG AntiTrack from the Control Panel > Programs & features. Then, use this link to download the latest version of AVG AntiTrack.
Let us know if the issue still persists after installing the latest version of AVG AntiTrack on your PC.