How to Get Rid of Flashmall and Offers4U Pop-up Ads - Removal Guide

I don't know how this happened but I am receiving pop-ups with several names. I didn't ask for or recognize such as (Flashmall, Offers4U, Trovi) to name the one's I recall off hand. Can anyone help me get rid of this plague? Since I have a 13" screen you can imagine what it is like to have 20-30 % of it taken up by almost continuous pop ads. 

Description of Flashmall and Offers4U

Flashmall and Offers4U are the adware which will install on user's computer without any permission and awareness along with third-party programs. They can be generated by Trojan horse virus or potentially unwanted program on the computer. After installed on the computer, Flashmall and Offers4U will add the unwanted browser extension and add-on to your browser and change the browser setting. When you open the browser, you will be redirected to some unwanted websites. When you surf the Internet,  Flashmall and Offers4U will generate a lot of pop-up ads, coupons, banners and sponsor links on all your browser.