I’ve always wondered how computer viruses are made. If someone creates a virus on their own computer, wouldn’t it infect and potentially destroy their system first before it’s spread to others?
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Viruses are just computer programs.
They are designed to spread copies of themselves to other computers. Possibly through a network, in old days through media like USB and floppy disks.
**They can have a destructive “payload** that is designed to do something (other than spread copies of itself) after being triggered on a certain date, or by a certain command.
Say you picked a certain date as the trigger condition, and the payload command was to erase the hard drive. As long as you removed it from your computer by that date you were fine.
there was a tool called [virus creation lab](https://en.wikipedia.org/wiki/Virus_Creation_Laboratory) that let non programmers put together a basic virus.
lots of people got into trouble playing with this.
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