Viruses in the 80s used to wipe everything or do something very visible with the screen. They got more creative in the 90s, especially after many people got an internet connection at work or at home.
Not all viruses do it intentionally, some are originally rather harmless but has unfortunate side-effects in its replication code. For example, when you use a floppy disk in a different format, the virus tries to overwrite it anyway...
Not all viruses do it intentionally, some are originally rather harmless but has unfortunate side-effects in its replication code. For example, when you use a floppy disk in a different format, the virus tries to overwrite it anyway...