A computer program that is designed to replicate itself by copying itself into the other programs stored in a computer. It may be benign or have a negative effect, such as causing a program to operate incorrectly or corrupting a computer's memory.
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An insidious piece of computer code written to damage systems. Viruses can be hidden in executable program files posted online; micro viruses can infect documents created in Microsoft Word and Excel, both of which support executable Macros written in VBA code.
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