A bug is a type of harmful code or program that, when performed, reproduces itself by customizing other computer programs and inserting its own code. investigate this site When this duplication prospers, the affected locations are then said to be infected with a virus.
Viruses often spread by creating a copy of themselves on a user's computer system without the user's understanding or authorization. In most cases, viruses will be spread out by e-mail accessories or by files shared on peer-to-peer networks. As soon as a virus has infected a computer system, it can spread out to other computers on the same network.
Some viruses are programmed to spread themselves in such a way that could trigger severe damage to a computer system. For example, an infection might erase files, fill a hard disk drive with useless information, or corrupt system files. In some cases, a virus might even display a message or image that is designed to frighten the user.
A lot of infections are reasonably safe, and just cause small inconvenience to the user. However, some viruses can be very hazardous, and can trigger widespread damage to computer system systems.