What is antivirus software and why do you need it?

Once you use a computer, laptop, or smartphone, there's a high chance you'll encounter the threat of viruses or other malicious software. Many people install antivirus software, but what is it exactly? And why should you use it? In this article, we explain step by step what antivirus software is, what it does, and why it’s far from optional.

What is antivirus software?

Antivirus software is designed to detect, block, and remove malicious programs—such as viruses, spyware, ransomware, and trojans. The term 'virus' has become a catch-all for any harmful software that can damage your device or steal information.

This software runs in the background on your system, continuously monitoring files, programs, and internet activity. If something suspicious is detected, it intervenes—usually without your notice.

What does antivirus software do?

Antivirus software performs a range of tasks to keep your device secure:

• File scanning: When opening, downloading, or installing files, the antivirus checks for anything suspicious.
• Real-time protection: As you use your device or go online, the software constantly monitors for suspicious behaviour.
• Blocking dangerous sites: Many antivirus packages warn you when you're about to visit an unsafe website.
• Automatic updates: The software regularly gets new virus definitions so it can detect new threats.
• Removing malware: If malware appears on your device, antivirus will quarantine or remove it as quickly as possible.

Why do you need antivirus software?

Without antivirus software, you face greater risks—even if you think you browse securely. Malicious software can enter your device through email attachments, infected websites, or fake apps. Consequences may include:

• Computer slowdowns or crashes
• Data loss or file corruption
• Identity theft or misuse of personal information
• Unnoticed participation in botnets or criminal networks
• Financial damage, e.g. via ransomware

Antivirus software is therefore not a luxury, but a fundamental necessity for safely using your devices.

Who needs antivirus software?

Anyone using an internet-connected device benefits from reliable antivirus software. Whether you're a student with a laptop full of study files, a business user handling client data, or a family managing multiple devices at home—you don’t want to risk losing sensitive information.

Even if you only check emails occasionally or do online banking, protection is essential. Attackers often strike when you least expect it—during quiet moments when you're less alert.

Free vs paid antivirus: what’s the difference?

Free antivirus tools are available, but they often offer limited protection. They typically lack extra features like a VPN, password manager, parental controls, or phishing protection. Paid antivirus software is more comprehensive, gets updates faster, and often provides support during incidents.

At Antivirus.eu, we always recommend based on your individual needs. We don’t just push the most expensive option—we help you choose what truly suits you.

Conclusion: a smart first step in digital security

Antivirus software serves as your first line of defence against harmful software. It helps prevent viruses and other threats from damaging your device, stealing your data, or slowing performance. Whether you're online a lot or just occasionally, a solid antivirus solution is both wise and necessary.

Still unsure which antivirus software suits you best? At Antivirus.eu, you’ll get honest, independent advice and support from real experts. We guide you step by step in choosing the right solution.