Different types of computer viruses

​There are different types of computer viruses based on their behavior and propagation mechanism.

Memory resident viruses - this type of viruses remains in computer’s memory while the virus is active and a computer is on. Majority of viruses now days are memory resident viruses.

Non-memory resident viruses is the type of virus that don’t reside in memory after execution.

Boot sector viruses - are the viruses that infect startup sector of the computer’s disk.

Macro viruses - are the viruses that us macros functionally of software to perform their functions. Macros functionally inside Microsoft office made it difficult if not impossible to use its functionality by computer viruses.

Email viruses is a type of a virus that uses email for propagation.

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