Can I download NU (Ordered Online) to a flash drive and install it on my home computer

My home computer keeps hanging up or there are msgs from Norton that order does not exist.  Today, from work, everything is there and it looks like I could access the file.  I just don't know if my idea will work.  Or, should I try to contact Norton and just get them to send me a CD for the program and install it that way.  Sorry I sound like such a newbie amongst all these gurus, but I am really stumped.  Thanks for listening.