Computer viruses are a type of malicious software that can infect a computer system without the user’s knowledge. Once a virus is installed, it can cause a range of problems, from displaying annoying pop-ups to damaging or deleting files.

There are many different types of computer viruses, but the most common ones are Trojans, worms, and ransomware. Trojans are malware that masquerade as legitimate programs, while worms are self-replicating programs that can spread quickly across a network. Ransomware is a type of malware that encrypts files on the infected computer and demands a ransom payment for the decryption key.

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