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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchFor most Windows 11 users, antivirus protection is necessary; buying a separate antivirus subscription usually is not. Windows includes Microsoft Defender Antivirus, and Microsoft says users do not need another real-time antivirus product alongside its security software. Macs also have built-in malware defenses. The decision is whether you need a paid product’s extra features—not whether every computer needs a second antivirus.
Do Windows 11 users need antivirus software?
Yes, they need malware protection, but Windows 11 already includes it. Microsoft Defender Antivirus is built into Windows, and Microsoft says it turns on automatically when another security product is absent or has expired. Microsoft Support says its security software protects against malware, spyware, adware, and other unwanted software, and that users do not need another real-time antivirus or antispyware product alongside it. Microsoft’s antivirus and antimalware FAQ also advises against running multiple real-time products together, because they can affect performance or interfere with updates.
This distinction matters: antivirus protection should be active, but paying for a second real-time antivirus is not automatically necessary. An on-demand scanner is different: it runs when you request or schedule a scan rather than continuously alongside Defender.
How well did Microsoft Defender perform in recent tests?
In AV-TEST’s March–April 2026 Windows 11 evaluation, Microsoft Defender Antivirus (Consumer) 4.18 received 6/6 for protection, 6/6 for performance, and 6/6 for usability. AV-TEST assessed 14 home-user products during those two months, using default settings and current publicly available versions; its methodology allowed real-world threats and cloud updates. See the Defender test results and details.
#1 Best Overall
- Android Security & protection
- Daily Virus Database checkup and updates
- Scan Apps and Files
- System Cleaner Integrated
- Virtual Private Network (VPN)
Those scores describe one product version under a specific test setup and period. They are not a probability of avoiding infection, a guarantee for every computer, or a prediction of protection against every future threat. AV-TEST’s separate May–June 2026 Windows 11 home-user results evaluated 16 products, including Bitdefender Total Security, across protection, performance, and usability. A product’s appearance in that test does not by itself show that it is necessary or the best choice for you.
Does a Mac need a separate antivirus?
Not by default. macOS includes several layers of malware defense: Gatekeeper, notarization, and XProtect. Apple describes XProtect as built-in antivirus technology that detects and removes malware, with signatures that update automatically. Apple’s macOS security guide explains these protections.
Rank #2
- Payment Protection – lets you to shop and bank safely online
- Proactive Anti-Theft – powerful features to help protect your phone, and find it if it goes missing:
- Anti-Phishing – uses the ESET malware database to identify scam websites and messages
- Call Filter – block calls from specified numbers, contacts and unknown numbers
- Antivirus – protection against malware: intercepts threats and cleans them from your device
Built-in defenses reduce the case for buying another tool automatically; they do not mean Macs are immune to malware. Consider an additional product only if you have a specific need that it addresses, and check how it interacts with macOS’s existing protections.
When might a paid antivirus suite be worth considering?
A separate suite can make sense when you want a particular capability or management option beyond the built-in protection. Evaluate the product on evidence and on features you will actually use, rather than assuming a paid subscription is inherently safer.
Rank #3
- - Light weight, lightning quick scanning of apps
- - Automatic scanning of newly installed apps to protect against a breach by malware, spyware, trojan and virus threats
- - Notifies you of harmful apps with the option to remove them immediately
- - Online virus definition updates to ensure that you always have the latest version available
- - Extremely low battery usage
- Independent results: Compare protection, performance, and usability scores from tests such as AV-TEST’s; check the test period and product version.
- Useful extras: Decide whether the suite offers a feature or management capability you need, rather than paying for a long feature list you will not use.
- Devices and platforms: Confirm current support for your devices, operating systems, and the number of devices covered before subscribing.
- Compatibility: Do not install a second real-time antivirus beside Microsoft’s protection without accounting for Microsoft’s guidance. Follow the product vendor’s current setup instructions.
For example, Bitdefender Total Security is listed among the products in AV-TEST’s May–June 2026 Windows 11 results. That establishes that it was evaluated, not that you need to buy it or that its current editions will suit your devices.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What about Android and iPhone?
The evidence cited here supports conclusions about Windows and macOS, not a current recommendation for Android or iPhone. Do not assume mobile devices work exactly like Windows PCs or Macs. A mobile-specific answer needs current guidance for the particular operating system and the protection features or app under consideration.
Quick Recap
Best Value
- Real-Time Virus Protection: Detect and remove malware, spyware, and viruses instantly.
- Junk File Cleaner: Clear unnecessary files to free up valuable storage space.
- Battery Saver: Extend your device’s battery life with efficient power-saving tools.
- Privacy Scanner: Keep your personal data secure with advanced privacy protection features.
- Wi-Fi Security: Detect and avoid unsafe networks to ensure secure online browsing.
Rank #4
- THREAT DETECTION – Stay one step ahead. Suspicious links, risky sites, viruses, and scams, caught automatically before they reach you.
- PERSONAL INFO PROTECTION – Keep your personal info safer. Identity monitoring watches for your exposed info and tells you what to do about it.
- SECURE CONNECTIONS – Just a few easy clicks, and we'll automatically protect your info on public Wi‑Fi, every time you connect.
- GUIDED ACTION – Know what matters and what to do next. Clear alerts and simple guidance make it easy to take action.
- MORE THAN ANTIVIRUS – Scam protection, identity monitoring, VPN, web protection, and antivirus work together to protect you, all in one place.
Practical answer
- Windows 11: Keep Microsoft Defender Antivirus active. Most users do not need to add another real-time antivirus subscription.
- macOS: The operating system has built-in malware defenses, so a separate antivirus is not an automatic requirement.
- Either desktop platform: Consider a paid product when you can identify a feature or management need it meets, and compare credible test results without treating them as a guarantee.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
