Viruses, worms, and Trojan horses are types of computer security risks that can negatively impact computers. Viruses copy themselves and spread throughout networks, using resources and potentially shutting down systems. Worms similarly spread automatically but do not need to be attached to other programs. Trojan horses disguise themselves as legitimate programs but carry hidden functions that activate under certain conditions. Antivirus software helps protect computers by identifying and removing viruses, but needs regular updates to recognize new threats.

1. Computer
Security Risks
Viruses, Worms, and Trojan Horses

2. Potentially damaging.
Negatively affect a computer and change
the way it works.
It spread and damage the computer’s files
and software.

3. Copies itself repeatedly and spreads
throughout a single computer or an
entire network.
Use up hard disk space or memory
resources.
Shutdown a computer or network.

4. A program that hides within or looks
like a legitimate program.
Triggered by certain condition or
action.
Does not replicate itself.

6. Protects your computer by identifying
and removing viruses found in your
computer’s memory, storage media, and
incoming files.
Needs to be updated regularly.