Most of us do not distinguish the real differences between malware, viruses and Trojan horses. All three are dangerous programs that can harm your computer. There are many differences between the three and if you know the difference you can better protect your computer from serious consequences.
What is Malware?
According to Science ABC, malware is a type of software (code) written to infect or compromise the system it invades (for example, the server system). It's simply a general term used to refer to a variety of types of penetrating or destructive software that negatively affect your system's performance. Malware can have many purposes. It can be used to spy on or steal information from your system, damaging your computer, or for extortion. Malware will become more dangerous as it is often hidden in the usual harmless files. 
Malware can include viruses, adware, nagware, spyware, worms, trojan horses, and many other types of malware. This means that viruses and trojan horses are two types of malware. So, if you want to distinguish between malware and viruses, it's like distinguishing between "weapons" and "guns".
What is a Trojan horse?
First, we will recall a famous legend in Greek mythology. After 10 years of fighting in the Trojan city, the Greeks could not defeat the Trojan army with military strength, so they were forced to follow the Odyssey's plan to unload the ship and get the wood to make it into a horse. a gift from the Greeks to compensate Athena for destruction. Essence in the horse filled with soldiers. When the Trojan troops got drunk after the victory banquet, the Greeks in the horse's abdomen broke out and opened the gate for the troops outside. Thanks to the wooden horse that the Greeks won and completely defeated the enemy. (According to Wikimedia) In the world of computing, the Trojan Horse concept came about when the Cult of the Dead Cow (CDC) created Back Orifice, the most famous Trojan ever. The reason they are so named because this malware has a lot of similarities with the wooden horse that was introduced into the Trojan horse in the past. Trojan horse is a type of malicious computer program dangerous. If someone tells you that your computer is infected with a Trojan horse, you will know that it is in serious trouble (unless your computer is pre-installed with a great antivirus software). Trojan horse has the ability to hide itself from normal, harmless software. Unfortunately, this makes it easier to bring negative effects to your computer. For example, when you see a cleanup software quite interesting. This software is committed to maximizing the efficiency of computer systems. You see that your computer is also needing to clean up. So you downloaded the software and manually installed it. Boom! Unconsciously, you successfully installed a Trojan horse into your computer! The effects of Trojan horses are varied. Some will "help you" change screenshots or throw your icons around, messing around the screen. Others cause more serious damage to your computer (spying, stealing or selling your information to third parties). And because the Trojan horse needs to have human installation in order to damage a computer, the best thing you can do is to not install any software unless it's part of it. Soft has a reliable and legitimate origin. Whether it's a virus or a trojan horse, they're all malware; And more or less, they all have a direct effect on the performance and life of your computer. And because your computer needs a lot of different software to serve your different purposes, then you should have a powerful anti-virus program that can protect your system from software. Malicious, including viruses and Trojan horses.
