virus help??

i think i have a virus on my computer anytime iam trying to read your blogs this stupid thing pops up blocked wheni clickonit it is trying to sell me antivirus. i just got my norton antivirus again trying to stop that but it keeps happeneing. the link at bottom says its from ieblacklist.com i googled that and it does not sound good. norton will charge me 99-140 dollars to remove what elese can i do???