Antivirus software used to be straightforward. You bought a box, installed it, and felt protected. These days the picture is murkier. Windows has its own built-in security. Threats have changed. And there are dozens of products all claiming to be essential. So what do you actually need?
What’s changed about the threat landscape
The viruses that antivirus software was originally designed to catch, self-replicating programs spreading via floppy disks and email attachments, still exist, but they’re no longer the main event. Today’s threats are more varied: ransomware, phishing, credential theft, business email compromise, and software vulnerabilities are where most of the real damage happens.
Traditional antivirus catches a lot, but it was built for a different era. That doesn’t mean you shouldn’t have it, it means you should understand what it does and doesn’t protect against.
What Windows Defender actually gives you
If you’re running Windows 10 or 11, you already have Microsoft Defender built in. It’s genuinely decent. It updates automatically, runs quietly in the background, and catches a solid range of common threats. A few years ago it lagged behind third-party options. That gap has largely closed.
For many small businesses, Defender, properly configured and kept up to date, provides a reasonable baseline of protection. The key phrase there is properly configured. Out of the box it does a lot, but there’s more it can do with the right setup.
When a third-party solution is worth it
There are situations where going beyond Defender makes sense. If your business handles sensitive client data, operates in a regulated industry, or your team regularly works on public Wi-Fi, a more comprehensive endpoint security solution gives you additional layers of protection.
Products like Malwarebytes, ESET, or enterprise-grade tools like Microsoft Defender for Business add features like more advanced threat detection, centralised management across all your devices, and better reporting. They’re not necessary for every business, but they’re worth considering if the stakes are higher.
What antivirus alone won’t protect you from
This is the part that often gets overlooked. Antivirus is one layer of protection, not a complete security strategy.
- A clever phishing email that tricks a staff member into handing over their password
- Weak or reused passwords that get compromised in a data breach
- A lost or stolen device with no encryption or remote wipe capability
- Outdated software with unpatched security vulnerabilities
- No backup when ransomware encrypts your files
Good security for a small business isn’t about one perfect tool. It’s about having several sensible layers working together. Antivirus is part of that, but only part.
So, do you need it?
Yes, but not necessarily a paid third-party product. What you need is endpoint protection that’s properly configured, regularly updated, and part of a broader approach to keeping your business secure. Whether that’s Defender alone or something more comprehensive depends on your business, your data, and your risk level.
Not sure where you stand? That’s exactly the kind of thing we help with at Matthew Temple Consulting.
We can review your current security setup and help you work out what you actually need.
