I wanted to view a programme which I had missed on Channel 4, but their viewer did not work as it repeatedly claims I have adblocker enabled, which was untrue. UPDATE: After contacting Channel 4 (who replied promptly although they need lots of info, like your operating system version), I found out that both Adblocker AND AntiBanner have to be turned off in your virus protection (as well as Adblocker on your internet search engine), or you can add the Channel 4 main web site to the exclusion list in both of these programs. The problem is now sorted, but pity there was not better information on their web page.