Installation on more devices

Does your statement '10 devices' on your response subscription letter mean that I can install AVG on a second computer? If so, how?

Hello, Xibaha

You are correct, '10 devices' means that you can use the product in up to 10 devices.
Use the below article to install the product in your other PC :
https://support.avg.com/SupportArticleView?urlname=Install-AVG-Internet-Security
You can use the below article to activate it :
https://support.avg.com/SupportArticleView?urlname=Activate-AVG-Internet-Security