What Is Search.upgradediscovery.com?
Search.upgradediscovery.com (Upgrade Discovery) is a fake search engine redirecting all searches to search.yahoo.com. If your browser’s default search engine has been changed to Search.upgradediscovery.com without your participation, you probably have a browser hijacker on your Macbook. A browser hijacker alters the default search engine and some other browser settings to force users to visit a search engine it promotes, bringing more Internet traffic to the site. Upgrade Discovery also adds new profiles to your Mac (with names like Positive Search Guide, Simple Search Guide, Skilled Search Advise, Accessible Search Engine, etc.).