What is an antivirus product? Do I need one?
Summary
An antivirus product is software that detects, isolates and removes viruses and other malicious software (malware) from your computer or laptop. Malware can arrive via dodgy email attachments, compromised websites, USB drives or other removable media, and can steal, encrypt or erase your data. Modern antivirus programmes update automatically and can quarantine or delete threats to stop damage to your device and your information.
Key Points
- Antivirus software detects, quarantines and removes malicious code to protect devices and data.
- Built-in antivirus is included with most Windows and Apple operating systems — switching it on gives you immediate protection.
- Some new PCs include trial versions of third-party antivirus (e.g. McAfee, Norton, Avast); trials usually expire and may conflict with built-in protection.
- After installation, run a full scan, enable automatic scanning of new files and ensure updates happen automatically.
- Smartphones and tablets generally do not need separate antivirus if you only install apps from official stores and keep software updated.
- Follow broader top tips (automatic updates, cautious downloading, reporting suspicious content) to reduce risk further.
Content summary
The article from the NCSC explains what antivirus software does and why it remains a key baseline defence for PCs and laptops. It stresses the importance of having antivirus switched on and kept up to date, notes potential issues with third-party trial products, and gives simple, practical steps for use: run a full scan on first install, scan new or removable media automatically and allow automatic updates. For mobile devices, the guidance says you don’t normally need antivirus provided you stick to official app stores and automatic updates.
Context and relevance
This is basic but essential cyber-hygiene advice. As threats like ransomware and data-theft malware remain common, ensuring you have reliable, up-to-date antivirus is a low-effort, high-value step for individuals and families. The guidance fits into wider trends emphasising layered defences: software updates, cautious behaviour online and using built-in protections before adding extra tools.
Why should I read this?
Short version: if you use a laptop or PC, this piece is worth a quick read. It strips out the jargon, tells you to switch on built-in antivirus, run that initial full scan and keep updates automatic. We’ve done the legwork so you don’t have to panic about choosing the right product unless you want extra features.
Source
Source: https://www.ncsc.gov.uk/guidance/what-is-an-antivirus-product
