Is Paid Antivirus Worth It on Windows 11? Microsoft Defender Protection and When to Upgrade

What Engadget argues​

Engadget's October 19, 2026 piece says Windows has had built-in antivirus since Windows 8 in 2012, so most people no longer need to pay for basic malware protection. Three claims carry the argument:

• Defender's track record: Engadget says Defender scored 0.5 out of 6 for protection in AV-Test's May–June 2015 round. It says Defender earned the full 6 in July–August 2026, detecting 100 percent of threats in both the real-world and widespread-malware tests.
• Where paid suites now compete: Threats today include fake login pages, invoice scams and fake "call this number" pop-ups. Engadget says paid suites compete on extras such as anti-scam tools, VPNs, password managers and family coverage.
• Costs of third-party software: Engadget cites Tom's Guide testing in which a full Malwarebytes Premium scan dropped Cyberpunk 2077 from 87 to 75 fps. A Bitdefender scan dropped it from 100 to 97 fps. It also says free tiers often nag you to upgrade.

Engadget's own conclusion is that a paid product is worth considering only if extras like a VPN or scam protection really matter to you.

What independent lab data shows​

AV-TEST's results page lists Microsoft Defender Antivirus (Consumer) 4.18 with 5.5 in the August 2026 listing. Its April 2026 round listed Defender as a "Top product" with 6 in each category. A WindowsForum analysis of the May–June 2026 round reports Defender at 6 for protection, 5.5 for performance and 6 for usability. That is a very slight performance difference, not a protection gap.

AV-Comparatives uses different methods. Its February–May 2026 real-world test had Defender block 396 of 400 cases, a 99.0% protection rate. In the same test, Bitdefender blocked 398, Norton, Avast and AVG 397, and Malwarebytes 395. Those gaps are a handful of cases out of 400, so treat them as a tight cluster, not a ranking that settles what to buy. As one review notes, several competing products also earned full AV-TEST scores, so the results don't prove Defender is uniquely superior.

The practical reading is that Defender now competes with paid engines on detection. Lab scores say little about scams, though. Malware-blocking tests cannot fully model modern fraud.

How to check that Defender is actually protecting you​

Microsoft says that when a compatible non-Microsoft antivirus is installed and active, Defender Antivirus turns itself off. Engadget makes the same point: you can't usefully run two real-time engines. So "I have Defender" is not the same as "Defender is protecting me right now."

1. Open Windows Security from the Start menu.
2. Select Virus & threat protection and review the status and any listed threats.
3. Look at the settings area to see whether Microsoft Defender Antivirus or a third-party product is the active provider.
4. If Defender is active, select Manage settings and confirm Real-time protection is on. Microsoft says that while it is off, files you open or download aren't scanned. It turns back on automatically after a short while.
5. Under Virus & threat protection updates, select Check for updates to refresh security intelligence. Windows normally downloads these through Windows Update.
6. To scan a single file or folder, right-click it in File Explorer and choose Scan with Microsoft Defender. On Windows 11 you may need Show more options first.
7. If you suspect an infection, run a Quick scan from the same page. Microsoft also offers Full, Custom and Microsoft Defender Antivirus (offline) scans. The offline scan restarts your PC and runs outside the normal Windows session, which makes it harder for persistent malware to hide.

If you are on a work or school PC, an administrator may manage these settings and you may not be able to change them.

Two built-in extras worth knowing​

• Ransomware protection: Windows Security includes Controlled folder access, which blocks untrusted apps from changing protected folders. It can also tie into OneDrive for recovery. This is a built-in answer to one of the features paid suites advertise. It is not identical to any vendor's own ransomware layer.
• Tamper protection: This stops malicious apps from changing key Defender settings. Microsoft says it doesn't affect how third-party antivirus apps register with Windows Security.

Malwarebytes: scanner versus always-on protection​

Engadget calls Malwarebytes' free app a good second-opinion scanner. Malwarebytes' help center, updated October 5, 2026, backs up that distinction for Windows:

• Free: Quick Scan, Custom Scan, Scam Guard, privacy controls and a Windows Firewall control tool.
• Paid: Real-time protection, web protection, malware protection, ransomware protection and exploit protection.

A free on-demand scan can catch something Defender missed. It is not continuous protection. Defender provides the always-on layer, and Malwarebytes Free adds an occasional second opinion. That setup costs nothing, but you have to run the scans yourself.

Where Edge SmartScreen fits​

Engadget notes that Microsoft Edge's SmartScreen checks sites and downloads against reports of phishing and malware. Microsoft's documentation describes it as a warning layer based on known-bad data. That makes it useful and free, but it is not a guarantee. A brand-new phishing page may not be flagged yet, and the final decision to enter a password still belongs to you.

When a paid suite can make sense​

• Mixed-device households: Norton 360 Deluxe, as Engadget describes it, includes a VPN, parental controls and 50GB of cloud backup, and these plans often cover phones and other devices. A single subscription across several platforms is a legitimate convenience.
• Less cautious users: If you support a relative who clicks on fake pop-ups, extra warnings and blocks may help, as Engadget acknowledges.
• Riskier habits: If you often install unsigned tools, cracks or remote-access software, one WindowsForum analysis argues you are outside Defender's "usually sufficient" comfort zone. That is a judgment call, not a lab finding.
• Wanting a specific feature: Some third-party suites offer more ransomware rollback than Defender, according to one review. That is a reviewer's assessment, and I have not verified it independently.

Before paying, ask which gap the subscription fills and whether you will use it. If you want a VPN or password manager, Engadget's view is that dedicated products are more reliable than bundled ones. Engadget bases that on its own Norton VPN review, which I did not re-test.

Caveats on the evidence​

• Engadget's performance figures come from a Tom's Guide test on one PC and one game. They show that a scan can cost frames, not that every suite slows every machine.
• Lab results are snapshots. They vary by test cycle, version and methodology.
• Defender's strong scores don't replace updates, multifactor authentication, backups and skepticism about unexpected links. A Windows Report analysis makes the same point.
• Plan contents and prices change. Check the exact tier and renewal price before you subscribe or renew.

The bottom line​

For a careful user on an updated Windows 11 PC, Defender is a sound primary antivirus, and the labs agree. Verify that it is the active provider and that real-time protection is on. Pay only for a specific feature you will use, such as family coverage or parental controls. Don't keep renewing out of habit.