How do trojan horse spread?

A computer infection is a type of malicious code or program that, when executed, replicates itself by modifying other computer programs and placing its own code. When this replication prospers, the impacted areas are then said to be contaminated with an infection.

https://ivfsurvivalguide.com/?p=320 Viruses frequently spread out by creating a copy of themselves on a user's computer without the user's understanding or authorization. Oftentimes, viruses will be spread out by email accessories or by files shared on peer-to-peer networks. As soon as a virus has contaminated a computer system, it can spread to other computer systems on the exact same network.

Some infections are programmed to spread themselves in a manner that could cause severe damage to a computer system. An infection may erase files, fill a hard drive with useless data, or corrupt system files. In some cases, an infection might even display a message or image that is developed to terrify the user.

Most infections are relatively harmless, and just trigger small inconvenience to the user. Some viruses can be extremely dangerous, and can cause widespread damage to computer system systems.