Emsisoft Anti Malware is a very professional anti-virus software with a built-in auxiliary detection system for malicious programs. It has a dual-engine scanner. The speed is nothing. Moreover, whether ransomware, robots, backdoors, or Trojan horses, can be used by the software. It can also help you clean up your browser and delete all the browser's useless things, especially annoying ads.
Emsisoft Anti-Malware has always performed very well in the detection rate and killing rate, and it also provides a free version (Emsisoft Emergency Kit). Even if it is not activated, you can use the free version directly. The most significant difference between the free version and the paid version is that some monitoring parts are missing, but the basic scanning function is still there. So if you are new to this anti-malware program, you can first try its free version, and you can use it as a free virus scanner.