when you received the mail with the serno. you have downloaded the SW install manager before (a file named 'SolidWorksSetup.exe', ~25MB).
When you execute this file, it downloads all the files needed for installation (~ 1.8GB) and gives you the option for installing directly after the download, download only for later installation on THIS computer, or download only for later installation on ANY computer.
(BTW You find this information in the email with your ser#).
Thank you very much everybody for your replies. I finally figured it out.
I am having a problem with the 32 bit download client, specifically the buttons don't work.
I get to the install option screen (as mentioned by Wolfgang above), where i can change the selection, but the "next" button (aswell as the others) are broken.
I have a design kit serial etc. (not that I can enter it lol)
I have disabled my AV.
(enrolled at Waikato Uni, Dept. Sci. & Eng. New Zealand)