Malware, or malicious software, is any program or file that is harmful to a computer user. Types of malware can include computer viruses, worms, Trojan horses and spyware.
MALWAREBYTES
Malwarebytes is a free security software that's built to keep you protected from – as the name suggests – malware, but that also means ransomware, malicious websites
Download link:https://www.malwarebytes.com/mwb-download/