First you have to know what’s the Malware, look at this post first : What’s key different between antivirus and antimalware ? , now you know you have to install antimalware in your windows ! IObit Malware Fighter is a anti-malware , so powerful . this app has 3 engine to protect your system :
1)IObit Anti-malware Engine
2)the world-leading Bitdefender Engine
3)IObit Anti-ransomware Engine ( to know what’s ransomare see this article : What’s Ransomware ? )
IObit has very powerful database to label on any Malwares!