14 years and five computers later, I haven't had a single malware issue because of the simple security hygiene I religiously ...

Malwarebytes free version is very good, but I don't know if it fits your requirement. Nowadays, you need more than one tool in your anti-malware bag of tricks.

This unusual, but not unheard of tactic, has two purposes. The first is to lock out other malware programs. The other is to mask its presence so you miss spotting its mischief. "It's unusual to see ...