Update to 21.1.0.18 one live update item (only) willnot load

I have two computers Win XP SP3 IE8 and Win 7 IE9 with NIS 2012 on each. Live update went fine on each except Norton Reputation Revocation list which would not complete.  I tried it several times over the next few hours with the same result. That particular item would not complete.  Eventually I followed all the get support instructions and finished up on the support page which seemed to suggest that the answer was to upgrade to the latest NIS 21.1.10.18 so I went through all that on both computers and exactly the same thing happened Norton Reputation Revocation List would not complete. Some hours later I tried it again and lo and behold it completed on my Win7 machine but still will not complete on my XP. Is this a known issue on XP or IE8 please?

 

Another thing I noticed was that the Norton toolbar appeared in a different format on XP than on Win 7. On XP it is larger with Norton check (or tick) in yellow circle then green check and "this page is secure" then grey symbol with "access vault" then a black arrow symbol "share via select" whereas the Win 7 toolbar has similar symbols without the wording.