Additional installations under same license

Can someone please explain how I would go about installing Avast Premier on my two other laptops after installing first installing it on my main laptop?

What do I need to do to avoid having to pay for it all over again? I haven’t purchased it yet but I want to know if this is an easy process because it isn’t with other security software (i.e. Norton, AVG). Very grateful for any advice.

same way you did on first computer, install and insert license file. http://www.avast.com/faq.php?article=AVKB87

and important before you install

General: Uninstalling a third-party antivirus software. http://www.avast.com/faq.php?article=AVKB11