After many years of being a computer tech and my own research, there is no one "silver bullet" to eliminate all virus or malware programs. There are many good programs for both. Sometimes 2 or 3 antivirus programs will be compatible together. Pick another good program, or use something to prevent one or another from starting. Then try another. Another choice would be to run virtual box/virtual machine, load another antivirus and run it. Or perhaps run the AV in some 'sandbox' program.
In the past, I have run 4 AV programs and found the system clean, but on the 5th or 6th found a virus program - and it was usually the nasty beat that was causing the problem. As many have said this is a GUIDE. One of many, there is no so-called expert that can give an absolute answer about the best, fastest, least overhead, etc program. I was fortunate enough to work in an academic computing environment for a while. They used one paid program version of a free program and changed to another paid version of a free program while I was there, part of which was cost and another part was the new one found a number of virus programs the old one missed. Take this as a FYI, not a declaration of "best in show".