Answer:
Computer viruses are programmed to harm your computer. Once a virus has successfully attached to a program, file, or document, the virus will lie dormant until circumstances cause the computer or device to execute its code. When the infected program is run, it causes the virus code to be executed. It will then start to infect the computer by damaging programs, deleting files, or reformatting the hard drive. Even less harmful computer viruses can significantly disrupt your system's performance, sapping computer memory and causing frequent computer crashes.
Explanation:
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