@ peterweb
If I log into https://manage.norton.com/ under Order History, Date of Order : 3/10/2011, the Norton Utilities I can access and download is version 15, and for that order it says for Windows XP / Vista / 7 / 8.
But if I log into https://account.norton.com/ under Order History, Date of Order: Mar 10, 2011, the Norton Utilities I can access and download is version 16. Have you tried logging into both sites to see if there is any difference in what may be available?
regards,
Laurence