How do I install on 2nd computer???
In the same way you installed it on the first, by downloading the installation file or copying the one downloaded before and transfer by USB, etc.
It does rather depend on what version you are using, avast 5.0 free or avast 5.0 Pro (or the avast internet security suite) ?
As then there are license issues for multiple installations.
where do i go on the avast site to do that?
KimmieSaved1,
To do what exactly “downloading avast antivirus” or “get a license key”? 
download. i can’t find where to go to download on the 2nd computer