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Computer Viruses exist because malicious "hackers" write them and disseminate them. Then other people download infected files or find infected computer media, and they run them. They are not the same as biological viruses. So if a computer virus or popup tells you someone dropped a disk in the toilet, you can rest assured that this is not how you got the virus. Computer viruses are just self-replicating computer code that often do malicious things to your computer.

In the 1980's and 1990's, computer labs were popular, and public libraries have computers available to the public even now. So if you used a public computer, you'd have a chance of getting a computer virus if you brought diskettes with you and inserted them in an infected computer or brought them home with you.

Nowadays, people are more likely to get viruses from going to bad websites, opening email attachments, using programs obtained through file-sharing or torrents, or using any program that comes from a questionable source.

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