0019 means that the firewall can't install. See this KB article for help on this - http://support.microsoft.com/kb/930159
And if that doesn't help, contact support -
http://help.live.com/help.aspx?project=onecarev2 -use the "Get More Help" link in the lower right of the page to contact support via email.
By the way, if you hold off a little longer, you won't need to uninstall and reinstall when 2.0 is released.
-steve