Ads popping up all over my screen

Do not know if I am in the right forum but will give this a try. Recently, ads are popping up all over on websites I am visiting, even to the point I cannot see the article I am wanting to research. I’ve tried to figure out how to get rid of these…no luck. I have Microsoft 8 as I purchased this computer last Feb. and it was my only choice. Greatly appreciate input.

http://forum.avast.com/index.php?topic=53253.0
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