Best antivirus for Windows 11 in 2025

While Windows 11 comes with Microsoft Defender, a built-in antivirus solution that provides adequate security, it may not be enough. Despite Microsoft Defender’s improvements, many users use additional Windows 11 antivirus software for more protection. Third-party antivirus programs typically offer more comprehensive features, including advanced ransomware controls, privacy tools, and robust endpoint protection.

If you’re concerned about a specific security threat or simply want to block malware and unwanted programs more effectively, it’s worth considering additional protection. In particular, if you’re handling sensitive data, I strongly recommend getting a third-party antivirus for peace of mind. For this review, I’ve researched and tested the best antivirus solutions for Windows 11 in 2025 to help you choose the best one for your needs.

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Best Windows 11 antivirus software: ranked

1. TotalAV

   Overall best Windows 11 antivirus with robust protection
   9.7
2. Norton Antivirus

   Affordable antivirus for Windows 11
   9.1
3. Bitdefender Antivirus

   Feature-packed antivirus for Windows 11
   9.4
4. Malwarebytes

   Reliable Windows 11 antivirus with lightweight performance
   8.0
5. Surfshark Antivirus

   User-friendly Windows 11 AV with solid security
   8.8

The best antivirus for Windows 11: Top tested picks for 2025

Windows 11 comes with free, built-in Microsoft Defender, which proves a good foundation for security. That said, I still recommend opting for a third-party antivirus for advanced antivirus features that Microsoft Defender might lack. Below are my top five tools that emerged as winners after my rigorous testing of 15 selected brands. They all performed exceptionally well on Windows 11, delivering protection and optimization of the device.

Through my own real-time testing, I gained all the insights necessary, but I also took into account findings from respected independent labs like AV-Test. Their regularly updated assessments provide insightful rankings of leading antivirus software.

1. TotalAV – overall best antivirus software for all devices

TotalAV is an excellent antivirus solution for Windows 11 users who prefer advanced malware detection and comprehensive security. Its standout feature is its exceptional ability to detect and eliminate a wide variety of threats, including viruses, spyware, ransomware, and more.

Malware detection. TotalAV standard scan took 16 minutes and detected 90% of the samples. A quick scan took about 3 minutes and detected 90% of the ransomware. When I came to the full scan, it took around 2 hours and 20 minutes, and all ransomware samples were successfully detected and quarantined for safety. While testing the real-time protection, TotalAV detected all samples, resulting in a 100% success rate.

System performance impact. TotalAV uses about 30% CPU with a quick scan. Throughout the full scan, it peaked at 80-90% of the total CPU and between 180-200 MB RAM. While the full scan slows down the PC, it remains very usable throughout the process.

Feature set. TotalAV’s feature set includes an integrated VPN that secures your web activity, ensuring your privacy while browsing or using public networks. It also offers system optimization tools, such as junk file cleanups and registry fixes, which improve the overall performance of your Windows 11 device. These tools not only enhance security but also contribute to the smooth running of your system.

Price and value. The price point for TotalAV starts at just $19.00/year, making it an affordable option for those looking for solid protection. TotalAV also includes a 30-day money-back guarantee with the annual subscription, providing reassurance for new users. Whether you're new to antivirus software or looking for a reliable solution, TotalAV offers top value for its price, combining security and system optimization features to keep your Windows 11 device safe and smooth.

For more information, read our in-depth TotalAV review.

2. Norton - top antivirus for Windows 11 with excellent malware detection

I concluded Norton to be the best antivirus solution for Windows 11 due to its powerful safeguarding capacity, which shields your device against a wide range of cyber threats at an affordable price. Norton achieved a perfect 100% virus detection rate in independent evaluations conducted by AV-TEST.

Malware detection. Norton offers four scan types: quick, smart, custom, and full-system. The full scan achieved a 100% detection rate for viruses and malware, effectively addressing ransomware, malware, malvertising, spyware, and potentially unwanted programs. It detected all samples after scanning 397,196 files in around 20 minutes, quarantining them instantly.

System performance impact. Norton uses around 1% of CPU and 110 MB of RAM with real-time protection and VPN on. During antivirus scans, resource usage increases. Smart scan peaks at 6% CPU and 120 MB RAM, quick scan at 18% CPU and 133 MB RAM, and full scan at 65% CPU and 170 MB RAM.

Feature set. Norton is packed with useful features. Its real-time threat protection monitors your system for potential dangers, automatically blocking any threats. The password manager securely stores and auto-fills your passwords, making online browsing safe and seamless. Norton Smart Firewall and Intrusion Prevention System checks for unauthorized access to your computer by analyzing incoming and outgoing traffic for any threats. The built-in Secure VPN provides encrypted internet connections, protecting your privacy when browsing or using public networks. Finally, Norton’s PC cloud backup automatically backs up your important files in the cloud to avoid data loss if your system fails unexpectedly.

Price and value. Norton antivirus is very affordable, considering the amount of protection it offers. It starts at just $29.99/year, with more advanced plans available for extra. Norton offers a 30-day free trial so you can explore its features before committing. Additionally, Norton offers a money-back guarantee for the whole 60 days on its paid plans, promising a full refund if you’re not completely satisfied with the service. With a perfect value-for-money balance, Norton is hard to beat when it comes to antivirus protection.

For more information, read our in-depth Norton antivirus review.

3. Bitdefender - feature-rich Windows 11 antivirus at a reasonable price

Bitdefender is widely regarded as one of the best antivirus solutions available for Windows 11, thanks to its comprehensive security features and advanced protection against a variety of cyber threats. Known for its robust real-time protection, Bitdefender excels in blocking malware, phishing attacks, and other malicious activities using machine-learning algorithms that adapt to emerging threats.

Malware detection. Bitdefender’s quick scan took 49 seconds but detected none of my sample threats. The full system scan, which took almost 2 hours, scanned 389,191 files and detected 99%. When I enabled the real-time protection, Bitdefender detected all of the malware samples downloaded during testing, achieving 100% effectiveness. When I additionally tested live malware protection, Bitdefender successfully detected and blocked 100% of the threats.

Its One-Click Optimizer identified 17K junk files, 15 registry issues, and 99 privacy concerns. This freed up 2.30 GB of space after cleaning, though many of the detected files were active temp files.

System performance impact. Bitdefender’s CPU usage was maintained at 25% with a quick scan and around 35% with a custom scan. The CPU averaged between 50-60% with a full scan, peaking at 70% a few times with a maximum consumption of around 180 MB RAM.

Feature set. Bitdefender is loaded with advanced security features, including a reliable VPN that encrypts your online activities, an Anti-Tracker tool to prevent websites from tracking your movements, and an Autopilot feature that automates routine security tasks, allowing users to enjoy a hassle-free experience. Other features, like secure online banking, password management, and a dedicated firewall, further enhance Bitdefender’s comprehensive protection package for Windows 11.

Price and value. Bitdefender offers flexible pricing, with paid plans starting at just $9.99/year. All subscriptions come with a 30-day money-back guarantee, allowing users to try the service risk-free. Whether you're after solid antivirus protection, online privacy, or system optimization, Bitdefender offers an all-in-one solution that delivers on all fronts for Windows 11 users.

For more information, read our in-depth Bitdefender antivirus review.

4. Malwarebytes - reliable antivirus for Windows 11 with lightweight performance

Malwarebytes is a lightweight yet powerful antivirus software solution for Windows 11, delivering reliable protection without being heavy on system performance. Known for its economic resource consumption, Malwarebytes runs quietly in the background while offering strong defenses against malware, ransomware, and other online threats.

Malware detection. Malwarebytes real-time protection scan blocked 50% of malicious URLs but failed to detect any malware downloads. Upon testing the Browser Guard feature, it successfully blocked all malicious URLs, achieving a 100% success rate. The full PC scan achieved a 99% malware detection rate, scanning 192,056 in just under 3 minutes.

System performance impact. Malwarebytes uses minimal system resources, with only 0-1% CPU and about 105 MB of RAM when idle. The full scan impacted PC performance more, with CPU usage ranging from 30% to 70%, spiking at 80%, and consuming up to 200 MB of RAM at times. The quick scan is faster but still causes up to 70% CPU jumps. The custom scan, with all options enabled, resulted in the CPU fluctuating between 30% and 70%.

Feature set. Malwarebytes offers several key features, including real-time protection against suspicious activity, an anti-ransomware engine that guards against file encryption attacks, and web protection to block harmful websites and phishing attempts. These features, combined with Malwarebytes’ easy-to-use interface, make it a top contender for users who want essential security without sacrificing performance.

Price and value. Pricing for Malwarebytes starts at $119.99/year, and the software also includes a 14-day free trial for Windows 11 users. Additionally, it offers a 30-day money-back guarantee, giving customers the flexibility to try the service risk-free. For users who prioritize a lightweight, efficient antivirus that doesn’t compromise on protection, Malwarebytes is a sure choice.

5. Surfshark One - convenient and lightweight antivirus for Windows 11

Surfshark One is a comprehensive security solution that provides solid protection for Windows 11 users while maintaining a user-friendly experience. Known for its lightweight design, Surfshark One delivers effective antivirus protection without slowing down system performance. Its intuitive interface ensures that users can easily navigate the software, making it a natural choice for those who want robust security and smooth, satisfying UX.

Malware detection rate. Surfshark One revealed interesting results. The quick scan failed to detect malware stored in uncommon folders, scanning over 8,000 files in less than a minute, indicating that it doesn’t use caching. The full scan took 17 minutes to scan 309,850 files. It identified almost all malicious files (99% success) deep within the C drive, quarantining them for manual removal. Although real-time protection mainly caught executable files with wild samples, it performed better with samples from EICAR, detecting 100% of threats with no misses.

System performance impact. Surfshark One used up to 70-80% CPU most of the time during the full system scan with 180-190 MB RAM usage. However, it was much lighter on the CPU during a quick scan, averaging between 6-10% CPU with 120 MB RAM usage.

Feature set. Testing aside, this antivirus includes a powerful VPN service that encrypts your online activity for added privacy and security. It also has Incogni, a data removal service that prompts various online data brokers to delete your personal information from their databases. With its intuitive interface and efficient performance, Surfshark is a great choice for users looking for comprehensive security without compromising on system performance.

Price and value. Starting at $50.85/year, Surfshark One offers excellent value for users seeking a comprehensive security suite. It also comes with a 7-day free trial and a 30-day money-back guarantee, allowing you to test the software risk-free. With its combination of ease of use, effective protection, and privacy features, Surfshark One is a strong choice for anyone looking to secure their Windows 11 device.For more information, read our in-depth Surfshark One review.

The best virus protection for Windows 11: Compared

Why an antivirus is necessary for Windows 11

Using a Windows 11 PC without antivirus software is highly risky, as it leaves your system vulnerable to various types of malware, including viruses, spyware, and ransomware. These malicious programs can compromise your personal data, damage files, and even render your system inoperable. While Windows 11 does come with a built-in antivirus, Microsoft Defender, it’s important to understand that relying solely on this tool may not be enough to fully protect your device from more intrusive threats.

Microsoft Defender offers basic protection against malware, such as real-time scanning, firewall protection, and network security. It is integrated into the operating system, providing users with some level of protection without needing to install third-party software. However, compared to more robust antivirus solutions like Norton or TotalAV, Microsoft Defender falls short in key areas. Norton, for example, provides a multi-layered defense system that includes advanced threat protection, cloud-based detection, and identity theft protection, all of which work together, providing excellent security. TotalAV offers additional features like a built-in VPN, ad blocker, and system optimization tools, which enhance the user’s protection and privacy while browsing online.

Microsoft Defender lacks most of these premium features, offering basic protection against malware and phishing attempts. Furthermore, Defender’s performance in detecting new or emerging threats isn’t as strong as Norton’s or TotalAV’s cloud-based, AI-driven engines. If you’re looking for comprehensive protection when browsing the web or engaging in online transactions, Microsoft Defender alone is hardly enough. To maximize security, I recommend investing in a full-featured antivirus like Norton or TotalAV.

Is there free antivirus software for Windows 11?

Yes, there are free antivirus software options for Windows 11, including popular ones like Avast, AVG, and Microsoft Defender itself. Avast offers some level of protection against malware, phishing, and ransomware, while AVG provides a user-friendly interface with good detection rates for viruses and performance issues.

However, these free options have their limitations, such as fewer advanced features, slower updates, and frequent ads or prompts to upgrade to paid versions. Free antivirus software also tends to lack dedicated customer support and can sometimes be less effective against newer threats. For more thorough protection and added features like VPNs, cloud storage, or identity theft protection, use sophisticated, paid AVs.

If you want more robust security, try TotalAV’s 30-day money-back guarantee for a risk-free trial of their premium services.

How we found the best antivirus software for Windows 11: methodology

As part of my testing, I used an Intel Xeon 8259CL processor with 32 GB RAM on a Lenovo 4 Gen Thinkpad. To ensure realistic testing, I used malware samples, including viruses, ransomware, trojans, and stealers, all varying in age, file type, and source. I tested 15 antivirus providers compatible with Microsoft Windows 11, shortlisting the 5 winner brands.

In-house malware detection testing

As part of my in-house testing, I sourced malware samples from EICAR, a reputable organization known for providing safe yet effective test files. I carefully planted these samples across various folders on my device to mimic real-world scenarios where malware can hide in different locations. Next, I ran the scans of multiple antivirus software tools, closely monitoring their performance. I tracked how many of the malware samples each AV tool successfully picked up, focusing on the detection rate for different types of threats, such as viruses, ransomware, and others. Additionally, I considered the speed of each scan to assess how quickly they could identify and neutralize the threats. Based on this thorough evaluation, I shortlisted only those antiviruses that demonstrated the highest efficiency and accuracy in malware detection, ensuring top-notch protection for users.

Evaluating system performance impact

When evaluating the system performance impact of antivirus software on Windows 11, I took a comprehensive approach to assess its effect on overall performance. First, I measured the baseline CPU load on my system before launching any AV, ensuring I had an accurate reference point for comparison. Next, I ran scans of varying intensities, from quick scans to full system scans, while continuously monitoring the CPU load throughout each process. I paid attention to significant jumps in CPU usage and how long they lasted. After the scans were complete, I checked the CPU load again to see if any residual performance impact remained. I also examined whether running the scans affected the responsiveness of other operational processes, such as opening applications, browsing the web, or multitasking. This allowed me to see how well each antivirus software protected the system without compromising on performance.

Considering additional security features

After covering the core antivirus aspects, I moved on to evaluate additional security features offered by AV programs for Windows 11. I prioritized the antiviruses that provided a comprehensive set of extra protection beyond the standard malware and virus detection. Key features I looked for included real-time threat protection, which helps identify and block threats as they emerge. I also noted secure VPN services for encrypted online browsing. In addition, I considered anti-ransomware technology, which protects sensitive files from encryption attacks. I also assessed web protection to block dangerous websites and phishing attempts, as well as other factors that aid overall Windows 11 protection. Based on these criteria, I included the AV brands with the best feature sets in my top 5 list.

Comparing price-to-value against the level of protection offered

Instead of offering the cheapest available options for Windows 11 protection, I focused on finding solutions that offered the best price-to-feature ratio. My goal was to ensure that users received not only affordability but also a robust set of features for the most comprehensive protection. This approach allowed me to prioritize antivirus programs that balanced both quality and cost-effectiveness. I evaluated key features such as real-time threat protection, malware detection, secure VPNs, and other extras to see if they came at a reasonable price tag. Comparing the pricing of each software against the level of protection it provided helped me to find the best value for money. This way, users can feel confident that they’re getting the best security for their money after making a decision.

With my findings in mind, TotalAV stood out as the best antivirus solution for Windows 11 due to its exceptional protection against a broad range of cyber threats and its affordability. It achieved a clean 100% virus detection rate in both independent evaluations and my own testing, easily becoming my top choice for comprehensive and reliable security.

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FAQs about virus protection for Windows 11

Does Windows 11 need antivirus?

Yes, Windows 11 needs an antivirus. Windows Defender is built into the system and provides essential protection against malware and other threats. However, it may not cover every potential risk, especially since cyberattacks have become more sophisticated. For enhanced security, it’s recommended to use additional antivirus software. Third-party antiviruses can provide extra features like advanced threat detection, real-time protection, and better defenses against phishing or ransomware.

Is Windows 11 antivirus good enough?

Windows 11 antivirus may not be good enough on its own for comprehensive protection. While Windows Defender provides basic defense against common threats, it may not be equipped to handle more advanced malware, zero-day attacks, or sophisticated phishing schemes. For enhanced security, it’s recommended to use additional antivirus software. Third-party solutions often have better threat detection and real-time scanning against emerging threats, keeping your system safe from a wider range of risks.

What is the best antivirus for Windows 11?

The best antivirus for Windows 11 is TotalAV, as it offers robust, all-around protection. While Windows Defender provides basic security, TotalAV takes it a step further with advanced features like real-time protection, multi-layered threat defense, VPN services, and protection against ransomware and phishing attacks. It’s particularly recommended for those who need enhanced security for sensitive information and online transactions. It also protects against more sophisticated threats that may not be covered by Defender alone. With TotalAV, you get that extra layer of defense, ensuring comprehensive protection for your system.

How to protect Windows 11 from viruses?

To protect Windows 11 from viruses, try using additional antivirus software on top of Windows Defender. While Defender provides adequate protection, it’s not always enough to protect against more advanced threats. Using third-party antiviruses like TotalAV can enhance your system security with real-time protection and advanced threat detection. TotalAV also provides features like a VPN, firewall, and identity theft protection, making it nearly the best option for safeguarding against a wide range of online threats.