What is a computer virus?
Computer viruses are programs that can replicate themselves and spread from computer to computer, usually through email or the internet. They are designed to damage, disrupt, or take control of a computer system without the user’s knowledge or consent. Computer viruses range from annoying pop-ups on your screen to more serious threats such as identity theft and data corruption.
How do computer viruses spread?
Computer viruses can be spread through a variety of methods, including downloading files from the internet, receiving email attachments, and visiting malicious websites. Email is one of the most common ways for them to spread, through attachments or links that are often disguised as harmless files such as documents or images.
How to prevent computer viruses:
- Keep your operating system and software up to date. Software updates often contain security patches that can help protect you against the latest threats. Microsoft ended regular support for Windows 10 on 14 October 2025, so if you are still on it, move to Windows 11 where you can.
- Make sure you have anti-virus protection switched on and kept up to date. Windows comes with Windows Security (Microsoft Defender) built in and switched on, and Macs have built-in protection too, so for most people that is a solid base. If you pay for extra protection, stick to a reputable brand.
- Be cautious when downloading files from the internet and avoid clicking on links or opening attachments from unknown sources.
- Use a firewall to protect your system from external threats such as hackers or malicious software. Windows and macOS both have one built in, so just make sure it is turned on.
- Turn on two-factor authentication for your email and other important accounts. A VPN is handy on public Wi-Fi, but it will not stop a virus.
Taking the necessary steps to protect yourself against computer viruses is essential in today’s digital world. It is important to be knowledgeable about how computer viruses work and how to prevent computer viruses so that you can take the proper precautions to protect yourself. By following the tips outlined above, you can help ensure that your computer is safe from the latest threats.
If you need additional help, contact us today and we'll help you with finding the right solutions for your system. We can also provide advice on how to best protect your data and keep your computer running smoothly.