Unable to reinstall Norton

Unfortunately, everytime Norton decides to do a live update, a window pops up telling me that it was unable to update and that my computer is now unprotected. The solution usual is to reinstall the product, which I have done in the past through my Amazon account easily. However, I purchased a new Norton when my subscription expired in November through the Norton website itself, which I am entirely new with. Now I can not figure out how to reinstall the product I purchased that is not yet expired for another year. I've tried going through purchase history, etc. and nothing seems to be working. I need help figuring out how to reinstall it again or my computer is vulnerable to viruses. Please Help.