Downloading Problem

Yesterday I tried to download Internet Security on a new HP Windows 7 computer and couldn't even get started.  It said I had to log on as a "system adminstrator" and would go no further.  I contacted Norton chat, and it took the representative over an hour to get IS installed, so it was not a simple problem.  She had to take over my computer, boot it to the safe mode, and do a lot of other things to get the download to work. I would have had no chance on my own. In my relief to have things working, I did not ask what the problem was.  I know this is very non-specific, but would anyone have any idea why this download would have been so difficult on a new computer? 

 

BTW, the lady who helped me was GREAT!  It is very comforting to know I can get help like that with Norton.