How are virus created?

Computer system infections are developed by individuals who desire to trigger damage to others, or who desire to get control over somebody else's computer.  A trojan horse is a kind of malicious code or program that, when executed, reproduces by inserting itself into various other computer system programs, information files, or the boot industry of the hard drive. Because of this, computer viruses can spread out throughout a network of computers as well as trigger severe damage.https://malwarezero.org/different-types-of-viruses-for-computers-a-beginners-guide/ When the infection is running, it can do anything its developer desires it to, including erasing files, stealing data, or sending out spam.