Media Viewer 1.1 is a extension installed by the Media Viewer virus which promotes ads by Media Viewer in all websites you visit. It will display inline text advertisements, popups by the sm2pub domain and Articles by Media Viewer. This extension is called and detected as the BetterSurf virus.
This malicious browser extensions that cause the “Ads by Media Viewer”, are made for one thing, and one thing only. To investigate your browsing behavior and to make money by advertisements. The distributors also often use the Google Search engine to promote inline advertisements on the top, right side of the Google Search engine or at the end of the page with text as “Ads by Media Viewer” or “Powered by Media Viewer”, “Brought by Media Viewer”. They inject inline-text advertisement to make money using pay per click advertisements.
It is advised to always read the Terms and Agreements before installing software on your computer. Do never click too fast thru the installation process [Next] button of software as you will agree to software you might not want to install. If the installer offers a Advanced or Custom option button, click it to find out if there is any other malicious software offered and installed during the installation process.