Malwarebytes, mentioned above is a good scrubber. Haven’t had much luck with McAfee. Kaspersky anti-virus is the best out there, IMHO.
I have gotten a window poppin popping up that warns of a trojan horse. It does not come from McAfee. It appears to be someone scaring you into downloading something. It gave me a long list of infections I supposedly had. I ran McAfee which found nothing.