How are bug developed?

Computer infections are developed by individuals who desire to trigger harm to others, or who desire to gain control over another person's computer.  https://catbitcoin.com/?p=904 The most basic method to produce an infection is to take some existing code and customize it slightly.  https://ivfsurvivalguide.com/?p=259 This new code can then be distributed to others, who might unintentionally run it by themselves computer systems. When the infection is running, it can do anything its developer desires it to, consisting of deleting files, taking data, or sending spam. More sophisticated viruses can be extremely difficult to eliminate and spot.