Add second computer

Hello Bruce. 
We're glad to help you with this.
To add another device to your AVG subscription, you need to manually install & activate the AVG subscription/program on that device.
Please refer to the below articles to install & activate your AVG Internet Security (Multi-Device) subscription on your other device:
1. Installing AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Install-AVG-Internet-Security)
2. Activating AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Activate-AVG-Internet-Security)
Let us know if you need further assistance.

How do I add my multi device internet security to a second computer

Hello Bruce. 
We're glad to help you with this.
To add another device to your AVG subscription, you need to manually install & activate the AVG subscription/program on that device.
Please refer to the below articles to install & activate your AVG Internet Security (Multi-Device) subscription on your other device:
1. Installing AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Install-AVG-Internet-Security)
2. Activating AVG Internet Security (https://support.avg.com/SupportArticleView?urlname=Activate-AVG-Internet-Security)
Let us know if you need further assistance.