Do You Actually Need Antivirus in 2026?

This is one of the questions I get asked most often. Someone's paying £30–80 a year for Norton or McAfee, and they want to know: do they actually need it? Or is Windows Defender good enough?

The short answer: for most people, Windows Defender is all you need. But there's more to it than that, so let me explain properly.

What Windows Defender Actually Does

Windows Defender (officially called "Windows Security" in Windows 10 and 11) isn't the basic, rubbish tool it used to be back in the Windows 7 days. Microsoft has invested heavily in it over the past decade, and it's now a genuinely capable antivirus.

Out of the box, for free, with no setup required, it provides:

• Real-time virus and malware scanning, constantly monitoring files as they're opened, downloaded, and created
• Cloud-delivered protection that checks suspicious files against Microsoft's cloud database for the latest threats
• Ransomware protection via "Controlled folder access", which can prevent unknown programs from modifying your Documents, Pictures, and other folders
• Firewall: a built-in network firewall that's on by default
• Browser protection via SmartScreen in Edge (and available for Chrome), blocking known malicious websites and downloads
• Exploit protection that hardens Windows against common attack techniques

In independent testing by AV-TEST (one of the most respected antivirus testing labs), Windows Defender consistently scores 17.5–18 out of 18, putting it on par with or very close to the paid options. That's a massive change from even five years ago.

What Paid Antivirus Adds

So if Defender is this good, what are Norton, McAfee, Kaspersky, and the others actually selling you? Mostly extras that aren't directly about virus protection:

• VPN. Most premium packages include one. Useful if you use public Wi-Fi a lot, but free VPN options exist
• Password manager, which is handy, but your browser already has one built in, and dedicated tools like Bitwarden (free) are better
• Dark web monitoring, which checks if your email or passwords have appeared in data breaches. Useful, but haveibeenpwned.com does this for free
• Parental controls (Windows has its own via Microsoft Family Safety)
• Identity theft protection, mainly a US-focused feature, less relevant in the UK
• Tech support: phone/chat support for security issues

Notice what's not on that list? Significantly better virus detection. The comparison below shows how they actually stack up:

The core protection is virtually identical. The paid products just bundle extras that are available for free elsewhere.

When Paid Antivirus Might Be Worth It

I'm not saying paid antivirus is a scam. There are situations where it makes sense:

• You're not confident with computers. If you regularly click links in emails, download things from unfamiliar sites, or struggle to tell real warnings from fake ones (read my post on how to spot fake virus popups), the extra safety net of a paid product with more aggressive blocking can help
• You want everything in one package. If you'd use the VPN, password manager, and dark web monitoring, a bundle can be good value compared to buying them separately
• You're running a business. Business machines with customer data, financial records, or confidential information benefit from the extra layer and the dedicated support

If any of those apply, Bitdefender or ESET are what I'd recommend. They're consistently top-rated, lightweight, and don't slow your PC down the way Norton and McAfee tend to.

When You Definitely Don't Need It

If you're a reasonably careful computer user who doesn't click random links, doesn't download pirated software, and keeps Windows updated, Defender is genuinely all you need. Save your money.

In fact, I'd go further: having no paid antivirus is better than having two. One of the most common causes of a slow, unstable PC I see is people running multiple antivirus programs at once, usually because a free trial came bundled with something and installed itself alongside Defender. They fight each other, eat resources, and cause more problems than they solve. I wrote about this in my post on common PC problems.

The Things Antivirus Can't Protect You From

No antivirus, free or paid, can protect you from everything. The biggest threats in 2026 aren't traditional viruses. They're:

• Phishing emails: convincing messages pretending to be from your bank, Royal Mail, HMRC, or Amazon. No antivirus can stop you entering your password on a fake website if you choose to
• Scam phone calls: "Microsoft support" calling to tell you your computer is infected. No software blocks a phone call
• Weak passwords. If your password is "password123" or your dog's name, no antivirus will save you when someone guesses it
• Social engineering: someone persuading you to install remote access software or hand over a code. The human is the vulnerability here, not the computer

The best protection against all of these is awareness, not software. Be suspicious of unexpected emails and calls, use different passwords for different accounts, and never give remote access to someone who contacted you first.

My Recommendation

For most people in 2026:

1. Keep Windows Defender on. It's on by default, just don't turn it off
2. Keep Windows updated. Updates include security patches for newly discovered vulnerabilities
3. Install uBlock Origin in your browser. It blocks malicious ads, scam popups, and tracking. It's free and makes a huge difference
4. Use strong, unique passwords, or use a password manager so you don't have to remember them all
5. Turn on two-factor authentication (2FA) on your email, banking, and any account that offers it. Even if someone gets your password, they can't log in without the second factor
6. Back up your files, because if the worst does happen, a backup means you haven't lost everything. See how to set up a proper backup

That combination is more effective than any paid antivirus subscription. The software is one small part of staying safe online. Your habits are the rest.

Mark

Mark has been fixing computers since the late '90s and went self-employed in 2008. Based in St Helens since 2013, he works evenings and weekends from his home in Laffak — friendly, affordable repairs for PCs, laptops, and Macs. See reviews on Google