When I got my first new computer[s}There was either Norton or McAfee installed on them,They both became crap to be blunt,Bitdefender and Kaspersky seem to get the best reviews,but early on Kaspersky made me nuts,keyboard problems and printer not working trouble.Malwarebytes and Emsisoft ,Hitman pro were the best secondary scanners.Used Bitdefender about 5 years then Avast about 4,since LOL everything under the sun. Now Kaspersky,Eset with voodooshield and Symantec endpoint are my present ones used on different computers