'Why does my search engine keep changing to Yahoo?': How to reset your browser settings to remove a potential virus

If your default search engine keeps changing to Yahoo suddenly when you traditionally use Chrome, Safari, or Firefox to surf the web, your computer is likely afflicted with malware. Manually resetting your browser's settings should stop the Yahoo redirect virus from obstructing your system. Yahoo is not to blame for the redirection — the malware has simply deposited you onto Yahoo's site after quickly funneling you through transitional domains, often collecting your data in the process. Visit ...