Installing avg internet security on a second computer

Angus, How many computers does your AVG Internet Security license cover?.. Have a look @ this article (http://avgclick.me/CoveredPCs).
AVG Guru

We have gone for a long time with a single computer but now have a second .  The package covers multiple pcs so how do i get it to cover the new one? Non technical answers please as my computer skills are limited .  Cheers.

Angus, How many computers does your AVG Internet Security license cover?.. Have a look @ this article (http://avgclick.me/CoveredPCs).
AVG Guru