OK, I downloaded and ran the SuperAntiSpyware and the problem still exists. The full link is:
It seems that this is causing issues for sevaral AOL users and the gremlin is within AOL's own software as you can read mail via AOL.Co.UK without an problems.
FYI...I have just used my AOL software accessing it via a 3G Vodafone data stick. No sign of the dreaded pop up.