Okay I have spent hours and days on trying to activate my retail purchase copy of one care. I have followed the instructions and gone throught the help information and Contact Support screens.
Nothing works!
So, why does it not work?
What happens when you try to activate?
Have you followed the steps here:
http://help.live.com/Help.aspx?market=en-US&project=onecarev2&querytype=topic&query=OneCare_PROC_Activate.htm
-steve