Install Adblock and it should stop most of the problems. (NOTE: it will not stop HTML5 videos)

Also check the options in your antivirus software, as most these days give you the option to block ads.

In addition make sure you have the latest Flash Player installed here

Hope this helps

Bill
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English Riviera:
Live entertainment, Real Ale, Great Scenery, Great Beaches, why would anyone want to live anywhere else (I�m definitely staying put).