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Viruses commonly have the following affects on computers: destruction/theft of data, and malicious access to the computer resources. Data is stolen sometimes for identity theft and sometimes for business reasons such as stealing customer information for competition. Other times the data is destroyed either for malicious reasons, or for interruption of business processes. Optionally the virus is installed for use as a 'door' to the computer's resources such as using the computer for spamming.

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18y ago

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