There is no conclusive response to this concern as the most common type of malware differs depending on which area of the world you are situated in, and likewise changes over time. Some of the most common types of malware include viruses, worms, Trojan horses, and adware.
Infections are one of the oldest and most typical kinds of malware. They are programs that are designed to duplicate themselves and spread out to other computers. https://scarabnet.org/?p=1424 Worms are similar to infections, but they are able to spread out without requiring to connect themselves to another program. Trojan horses are programs that masquerade as something else, such as a video game or a genuine program, but are actually malicious. Adware is a kind of malware that displays marketing on a computer, typically in a pop-up window.
Malware is constantly evolving, and brand-new types are continuously being produced. The types discussed above are some of the most typical that you might encounter.