Yeah I thought that aswell Mike, but after putting it on my girlfriends PC she was still bombarded by pop-ups ... I remember when I had IE and the toolbar it blocked 95% of pop-ups ... it didn't block any this time however so I needed to look for another solution.
I installed Spybot on her PC and did a full scan to remove 104 cases of spyware/adware/tracking cookies etc

and removed a pile of spyware programs which had installed themselves on her PC.
Her anti-virus needed updating and a full scan done (luckily she had no viruses) and it needed a good spring cleaning ... so last thing on the list a pop-up blocker ...
Cheers guys, I will test these out and let you know the results