A computer virus is a type of malicious software (malware) that is designed to replicate itself and spread from one computer to another. It can infect a computer and cause harm to the system by deleting files, stealing personal information, corrupting data, and even rendering the system inoperable.

Viruses can be spread through various methods, such as email attachments, infected software downloads, and malicious websites. Once a virus infects a computer, it can spread to other computers on the same network or via removable storage devices like USB drives.

Although not defined in the Data Protection Act, the Information Commissioner has advised that "vital interests" should be interpreted as relating to life and death situations: e.g. the disclosure of a data subject's medical details to a hospital casualty department after a serious accident.

A virtual private network establishes a digital connection between your computer and a remote server owned by a VPN provider, creating a point-to-point tunnel that encrypts your personal data, masks your IP address.  It will avoid website blocks and firewalls on the internet.  This means you online experiences are provite, protected and more secure.

a security flaw, glitch, or weakness found in software code that could be exploited by an attacker

a worm is a standalone piece of malicious software that reproduces itself and spreads from computer to computer.