Zemana AntiMalware 

Zemana AntiMalware can protect your system from various types of threats and unauthorized software, like viruses, Trojans, rootkits, worms, spy programs, adware as well as unwanted browser add-ons and toolbars. It works as an additional protection along with your main AV software to keep your computer clean.

Its intuitive interface makes it extremely easy to use, even by inexpert users. The application provides free on-demand protection. However, if you want to enjoy real-time defense, you need to buy its Premium version, which also protects you against ransomware and provides 24/7 technical support.

Probably its best advantage is that it uses a cloud-based scanner, which guarantees that the most updated definitions are always used, and as a result, you get protection against very recent virus outbreaks. Moreover, as this program does not store virus definitions locally but on the cloud, it uses very little storage space and few system resources. And not only that, it uses Pandora Cloud-Sandbox technology to reinforce zero-day malware and ransomware protection. The downside of this is that the application cannot work properly on offline mode.

All in all, Zemana AntiMalware is not meant to be used as your only protection against ill-intentioned software. Instead, it can successfully defend you against some threats that can go undetected by standard AV tools. Luckily, it does not generate any type of conflict with them. It is also good to know that its Premium version is sold at a very reasonable price.