I like to use google on my windows 10 computer but every few weeks or so the computer likes to switch back to yahoo without my input of any kind. I even delete the search engine from my list of search engines and it still comes back every few weeks. I believe this to be because of the McAfee antivirus software that came preinstalled on my computer (which I no longer use), but I don't know how to go about either removing yahoo from the McAfee software or removing McAfee entirely. Thanks!