Bill, Have a look @ this official AVG article (http://avgclick.me/LicenseTransfer).
AVG Guru
I believe I have four computers protected by AVG. Since I first purchased AVG one computer died and was replaced and one other computer is no longer connected to the Internet. I was not able to transfer the license from my deceased computer to the new one, nor was my son who is a computer genius. I have always had great difficulty installing and renewing licenses and now I keep getting notices of automatic renewal and I no longer know to what computers my various licenses, installed and uninstalled, relate. I am now thoroughly confused but this is a familiar experience I seem to have every time I deal with AVG. If you can't sort this out I will be cancelling everything. Life is difficult enough without having to contend with this nonsense.
Bill, Have a look @ this official AVG article (http://avgclick.me/LicenseTransfer).
AVG Guru