I simply do not understand why people get so worked up about virus/trojan/malware removal and prevention and why they waste time and resources with real time prevention when it really is not needed. I do think it is a good idea to scan for viruses and malware once a week or so to make sure your system is running a peak performance. You want to prevent a virus from doing any harm, there is a simple and 100% sure fire solution .... use a program like Paragon ( free version ) and keep a current drive image on an external media. If you get hit... get a cup of coffee, have a donut, and relax while your drive is restored.
Shoot, I've been doing this for over 20 years now and have been hit a few times but it was no big deal and I was down what .. an hour or so while it was restored.