A bug is a kind of malicious code or program that, when carried out, duplicates itself by modifying other computer programs and inserting its own code. When this duplication prospers, the affected areas are then said to be infected with a virus.
Infections frequently spread by producing a copy of themselves on a user's computer without the user's knowledge or authorization. In a lot of cases, viruses will be spread by email accessories or by files shared on peer-to-peer networks. When a virus has actually contaminated a computer system, it can spread to other computer systems on the exact same network.
https://bikramyogauk.net/?p=971 Some viruses are set to spread themselves in such a way that could cause major damage to a computer system. An infection may erase files, fill a hard drive with worthless data, or corrupt system files. In some cases, a virus might even show a message or image that is created to terrify the user.
The majority of viruses are reasonably harmless, and just trigger minor inconvenience to the user. Some infections can be really unsafe, and can cause prevalent damage to computer system systems.