Looking for the best free antivirus for Windows 11? Read this guide until the end because we carefully analyzed each option based on real-world performance, malware protection, system impact, usability, and overall security rankings to help you choose the right protection without slowing down your PC.
Windows 11 includes stronger built-in security than older Microsoft operating systems, but that does not mean malware attacks have disappeared. Phishing links, fake installers, ransomware, browser hijackers, and malicious downloads still target millions of users every year.
Many people rely entirely on Microsoft Defender for Windows 11, while others prefer installing additional security tools for extra protection. The problem is that some antivirus programs consume too many system resources and make computers feel slower during everyday tasks.
That is why many users now search for the best balance between protection and performance. A good security tool should block threats in real time while keeping startup times, browsing speed, gaming performance, and app launches smooth. The demand for free antivirus for Windows 11 has also increased because users want reliable protection without paying yearly subscription fees.
Finding the right option is not always easy. Some free security apps include aggressive ads, unnecessary bundled tools, or heavy background scanning that affects performance. Others focus more on lightweight protection and low CPU usage. Users who want to protect Windows 11 from malware without slowing down PC performance usually prioritize fast scanning, real-time defense, and minimal system impact.
According to AV-TEST, several antivirus solutions for Windows 11 achieved high malware protection scores while maintaining low performance impact during independent testing.
If you are looking for free antivirus for Windows 11 that balances security and speed, the sections below break down which options stand out and why they may fit different types of users.
How We Ranked the Best Free Antivirus for Windows 11
Not every antivirus application performs the same way on Windows 11. Some programs focus heavily on advanced protection features, while others prioritize lightweight operation and minimal resource usage. To identify the best free antivirus for Windows 11, we looked beyond feature lists and considered how each tool performs during real-world daily use.
Our evaluation process focused on several key areas. Malware detection was the most important factor because strong protection against ransomware, spyware, trojans, and phishing threats remains essential. However, performance impact was equally important since many users want antivirus without slowing down computer performance during gaming, multitasking, streaming, or office work.
We also reviewed real-time protection quality, scan speed, usability, notification frequency, and compatibility with modern Windows 11 systems. Some free antivirus tools constantly push premium upgrades through ads and popups, which can negatively affect the user experience. Others offer cleaner interfaces and fewer interruptions.
Based on AV-Comparatives performance evaluations, antivirus software can noticeably affect application launches, file transfers, and browsing speed on Windows 11 devices.
That performance difference becomes even more noticeable on laptops and older desktop hardware. Because of that, we paid close attention to antivirus with low CPU usage and memory consumption. Lightweight performance matters just as much as strong malware detection for many users today.
Independent lab results from AV-TEST and AV-Comparatives also helped support our rankings, but this guide focuses heavily on practical usability. Instead of relying only on benchmark scores, we considered how these tools behave during everyday browsing, downloads, gaming sessions, and background activity.
Some users simply need basic protection, while others want extra web filtering, ransomware defense, or malware cleanup tools. That is why this ranking includes a mix of built-in protection, lightweight antivirus for Windows 11, and feature-rich security software designed for different needs and PC types.
7 Best Free Antivirus for Windows 11
Every antivirus solution has different strengths. Some focus on low system impact, while others prioritize advanced malware detection or extra web security features. Choosing the right free antivirus for Windows 11 depends on how you use your computer and what kind of protection matters most to you.
For example, casual users may prefer built-in protection that works quietly in the background. Gamers and users with older hardware often look for lightweight tools with minimal CPU usage. Others may want stronger phishing defense, ransomware protection, or advanced malware cleanup features.
The comparison table below highlights the main differences between the most recommended free antivirus software for Windows 11. It compares performance impact, real-time protection availability, limitations of the free versions, and starting premium prices for users who may eventually want additional features.
Quick Comparison of the Best Free Antivirus for Windows 11
| Antivirus | Best For | Performance Impact | Real-Time Protection | Free Version Limitation | Starting Premium Price |
|---|---|---|---|---|---|
| Microsoft Defender | Built-in protection | Very Low | Yes | Limited advanced tools | Free |
| Avira Free Security | Low-end PCs | Very Low | Yes | VPN limitations | ~$26/year |
| Bitdefender Free | Strong malware protection | Low-Medium | Yes | Fewer extra tools | ~$40/year |
| AVG AntiVirus Free | Everyday users | Low | Yes | Upsell prompts | ~$45/year |
| Kaspersky Free | Advanced detection | Low | Yes | Region limitations | ~$35/year |
| Avast Free Antivirus | Feature-rich security | Medium | Yes | Aggressive ads | ~$50/year |
| Malwarebytes Free | Malware cleanup | Very Low | Limited | No full real-time protection | ~$45/year |
Users searching for the best malware protection for Windows 11 should not focus only on detection scores. System impact, usability, and long-term reliability also play a major role in choosing the right security solution.
1. Microsoft Defender
Many users searching for free antivirus for Windows 11 often overlook the protection already included with the operating system. Microsoft Defender has improved significantly over the past few years and now delivers much stronger protection than older versions of Windows Security ever did. For casual users, it provides a convenient starting point without requiring additional downloads or subscriptions.
One of the biggest advantages of Microsoft Defender for Windows 11 is seamless integration. Since it comes preinstalled, there is no setup process, extra account registration, or bundled software to remove. Everything works directly inside the Windows Security dashboard, making updates and scans easy to manage even for beginners.
Performance is another reason Defender remains popular. It generally runs quietly in the background and avoids heavy CPU usage during regular tasks like browsing, office work, and streaming. Users who prefer a clean Windows experience often appreciate the fact that there are no aggressive advertisements or constant upgrade prompts.
That said, some users still question whether built-in protection alone is enough. The discussion around “How Good Is Microsoft Defender Antivirus for windows 11” continues because third-party antivirus tools sometimes provide additional phishing filters, ransomware shields, or advanced web protection features not fully covered by Microsoft’s default security tools.
Pros
- Built directly into Windows 11
- No installation required
- Stable performance during daily use
- No subscription pressure or intrusive ads
- Strong real-time protection for casual users
Cons
- Limited advanced security features
- Web filtering can feel basic compared to premium tools
- Advanced ransomware protection is not as extensive as some competitors
- Fewer customization options for power users
Microsoft Defender works best for casual users who want reliable built-in security without installing third-party programs. It is also a good fit for people who prioritize simplicity and system stability over advanced features. While many users still install free antivirus for Windows 11 from external vendors, Defender remains one of the strongest built-in options currently available.
For users with newer hardware and safe browsing habits, it can already provide a solid baseline of protection without heavily affecting performance.
2. Avira Free Security
Avira Free Security has quietly become one of the most balanced options for users who want lightweight protection without sacrificing malware detection quality. Unlike many security suites that overload systems with unnecessary background services, Avira focuses heavily on low resource consumption and clean usability.
This makes it especially attractive for older laptops and budget desktops running Windows 11. Users searching for free antivirus for Windows 11 often complain about sluggish startup times or reduced performance after installing security software. Avira avoids much of that problem thanks to its cloud-assisted scanning system and efficient background processes.
Its detection engine uses cloud-based analysis to identify suspicious files quickly while reducing the need for constant heavy local scanning. That approach helps maintain smooth browsing, faster app launches, and lower memory usage during multitasking sessions. Users looking for lightweight security software for old pc setups will likely appreciate how little impact Avira has during everyday use.
Another advantage is its relatively simple interface. Unlike some free antivirus tools filled with cluttered menus and endless upgrade popups, Avira feels cleaner and easier to navigate. While premium upgrade prompts still exist, they are generally less aggressive compared to several competitors.
For people trying to protect Windows 11 from malware without slowing down pc performance, Avira consistently stands out as one of the better-balanced free solutions.
Pros
- Very low CPU and RAM usage
- Fast cloud-assisted scanning
- Clean and beginner-friendly interface
- Good malware and phishing protection
- Suitable for older Windows 11 systems
Cons
- VPN data limits in the free version
- Some premium tools locked behind subscriptions
- Occasional upgrade recommendations
- Fewer advanced customization options
Avira Free Security is ideal for low-end PCs, older laptops, and users who prioritize lightweight protection above all else. People who want antivirus with minimal system impact during daily browsing, office work, or streaming sessions will likely find it more comfortable than heavier security suites.
It is also a strong choice for users who need free antivirus for Windows 11 but do not want constant performance slowdowns while multitasking or gaming casually. Its combination of cloud-based detection and efficient background activity makes it one of the better lightweight security options currently available.
3. Bitdefender Antivirus Free
Bitdefender Antivirus Free is widely known for its strong security engine and dependable web protection. While some free antivirus tools mainly focus on basic scanning, Bitdefender adds several layers of defense that help block modern online threats before they reach the system.
One of its strongest features is anti-phishing protection. Fake banking websites, scam login pages, malicious advertisements, and fraudulent download links continue to target Windows users every day. Bitdefender actively monitors suspicious websites and attempts to stop dangerous pages before users accidentally share sensitive information.
The software also performs very well against zero-day threats. These attacks often exploit newly discovered vulnerabilities before official security patches become widely available. Bitdefender uses behavioral monitoring and cloud-assisted analysis to detect suspicious activity early, even when malware signatures are still new. That extra layer of detection is one reason many users consider it among the safest free antivirus for pc users who prioritize strong protection.
Automation is another area where Bitdefender performs well. Updates, background scans, and threat responses usually happen automatically without requiring constant user interaction. Instead of overwhelming users with alerts and technical settings, the software quietly handles most security tasks in the background.
For people searching for free ransomware protection for Windows 11, Bitdefender also delivers stronger ransomware defense than many lightweight competitors. While premium versions include additional protection layers, even the free edition offers solid real-time monitoring against suspicious encryption activity and malicious file behavior.
Web browsing protection remains another major advantage. Malicious scripts, infected downloads, and suspicious browser redirects are common attack methods today. Bitdefender’s security engine helps reduce those risks without creating excessive interruptions during normal browsing sessions.
Its overall balance between strong malware detection and automated usability makes it a popular choice for users who want reliable real-time protection for Windows 11 without spending time constantly managing settings or security warnings.
Pros
- Excellent malware and phishing detection
- Strong web security protection
- Effective zero-day threat monitoring
- Quiet automatic background operation
- Reliable ransomware defense features
Cons
- Full scans can use more system resources
- Free version includes fewer advanced features
- Limited customization for advanced users
- Some extra tools require premium upgrades
Bitdefender Antivirus Free works best for users who prioritize protection quality over extra bundled features. People who frequently download files, browse unfamiliar websites, or want stronger anti-phishing protection will likely benefit from its security-focused approach.
It is also a strong option for users who want free antivirus for Windows 11 with reliable malware defense but prefer software that operates quietly in the background. While it may not be the lightest security solution available, its strong detection engine and dependable web protection continue to make it one of the most trusted free antivirus tools for Windows 11 users.
4. AVG AntiVirus Free
AVG AntiVirus Free remains one of the most recognizable names in the consumer security market, and there is a good reason for that. It delivers a practical balance between malware protection, ease of use, and system performance without becoming overly complicated for everyday users. People searching for free antivirus for Windows 11 often want something simple that works reliably in the background, and AVG fits that role quite well.
One of AVG’s strongest advantages is scan speed. Quick scans complete fast, while deeper scans still manage to avoid excessive slowdown on most modern Windows 11 systems. For users who frequently download files or connect external drives, fast scanning can make a noticeable difference during daily use.
The interface is also easy to navigate. Many free security tools overwhelm users with technical settings and confusing menus, but AVG keeps most features accessible through a clean dashboard layout. Even beginners can quickly start scans, review threats, or adjust protection settings without digging through complicated menus.
Performance remains relatively lightweight compared to some feature-heavy antivirus suites. While AVG is not the lightest option available, its background activity usually stays manageable during browsing, streaming, and productivity tasks. Users searching for free malware protection for Windows 11 often prioritize software that does not interfere with normal computer use, and AVG generally performs well in that area.
Another reason AVG continues to attract users is familiarity. Many people already recognize the brand, making it a comfortable choice for those who want dependable protection without learning an entirely new security platform. Its free version also includes real-time protection, which helps block threats before they can spread throughout the system.
Some upgrade prompts do appear inside the interface, especially for premium tools, but the overall experience still feels less intrusive than certain competitors in the free antivirus market.
Pros
- Fast malware scanning performance
- Easy-to-use interface
- Reliable real-time protection
- Decent lightweight performance during daily tasks
- Good balance between usability and security
Cons
- Frequent premium upgrade prompts
- Some features overlap with Avast technology
- Can feel slightly heavier during full scans
- Advanced tools locked behind paid plans
AVG AntiVirus Free works best for regular home users who want reliable security without spending time adjusting advanced settings. It is especially suitable for people looking for antivirus for Windows 11 free download options that combine simplicity, decent performance, and solid malware protection in one package.
For users who browse frequently, download files regularly, or simply want consistent background protection without a complicated learning curve, AVG remains one of the more balanced choices available today. Many users searching for free antivirus for Windows 11 still choose AVG because it delivers stable everyday security without becoming overly resource-heavy on most systems.
5. Kaspersky Free
Kaspersky Free has long been recognized for its strong malware detection capabilities and efficient security engine. Even though some users remain cautious because of geopolitical concerns surrounding the company, the software itself continues to perform extremely well in independent malware protection tests. For people focused purely on security effectiveness, Kaspersky still ranks among the strongest free antivirus options available for Windows 11.
One of its biggest strengths is detection accuracy. Kaspersky performs especially well against ransomware, trojans, spyware, malicious downloads, and phishing attacks. Strong behavioral monitoring helps identify suspicious activity quickly, even when threats are newly emerging or disguised inside seemingly harmless files.
Its low false positive rate is another major advantage. Some antivirus tools incorrectly flag safe applications too often, which can frustrate users and interrupt normal workflows. Kaspersky generally avoids that problem better than many competitors, making the overall experience feel more reliable and less disruptive during daily use.
Performance also remains surprisingly lightweight considering the strength of its detection engine. Users looking for free antivirus for Windows 11 with minimal background slowdown often find Kaspersky more efficient than expected. Browsing, multitasking, and office applications usually continue running smoothly while protection stays active in the background.
The software also includes strong phishing protection for Windows 11 users who frequently shop online, access banking websites, or handle sensitive personal information through browsers. Malicious websites and fake login pages continue to be major attack vectors, and Kaspersky’s web filtering system helps reduce those risks effectively.
Another reason many users still recommend Kaspersky is its dependable spyware protection for Windows 11 systems. Spyware threats often operate quietly in the background collecting personal information, browser activity, or login credentials. Kaspersky’s layered monitoring system helps detect suspicious behavior before major damage occurs.
Pros
- Excellent malware detection accuracy
- Very low false positive rates
- Lightweight background performance
- Strong anti-phishing and spyware protection
- Reliable real-time security monitoring
Cons
- Availability may vary by region
- Ongoing geopolitical concerns affect trust for some users
- Premium upsell prompts still appear occasionally
- Some advanced tools require paid upgrades
Kaspersky Free works best for users who prioritize malware detection quality above everything else. People searching for free antivirus for Windows 11 with strong ransomware defense, advanced threat monitoring, and efficient system performance will likely appreciate its balanced approach.
It is also a strong option for users who frequently browse unfamiliar websites, download software regularly, or need dependable phishing protection without installing an overly heavy security suite. Despite ongoing controversy around the brand, many users still consider it one of the technically strongest free security solutions currently available.
6. Avast Free Antivirus
Avast Free Antivirus remains one of the most widely recognized security tools for Windows users because it offers more built-in features than many competing free antivirus solutions. While some antivirus programs focus only on basic malware scanning, Avast includes additional security tools designed to improve browsing safety, monitor suspicious activity, and help protect local networks from common vulnerabilities.
One of its standout features is the built-in network scanner. This tool checks Wi-Fi networks and connected devices for potential weaknesses such as unsecured routers, outdated firmware, or weak passwords. For households with multiple connected devices, that extra layer of visibility can be useful for improving overall network security.
Avast also includes ransomware-focused monitoring tools that watch for suspicious encryption activity. Ransomware attacks continue to target Windows users aggressively, often locking important files and demanding payment to restore access. Avast attempts to reduce that risk through behavioral analysis and active threat monitoring in the background.
Another reason many users still install Avast is usability. The interface feels modern, clean, and relatively beginner friendly despite including several additional features. Important tools are easy to find, and the software generally avoids the overly technical menus that can make some security applications difficult for casual users to manage.
Its secure browsing protection for Windows 11 users is another useful addition. Modern malware attacks often begin through fake websites, malicious ads, infected downloads, or phishing pages rather than traditional executable files. Avast helps block suspicious web activity before dangerous content reaches the system.
Performance impact is mixed depending on the device and enabled features. During regular browsing or office work, Avast usually performs reasonably well. However, enabling several background modules simultaneously may increase memory usage more than lightweight competitors like Avira or Microsoft Defender.
Even with that drawback, many users still consider Avast among the best antivirus for gaming Windows 11 systems because it includes gaming-focused settings that help reduce interruptions during fullscreen gameplay. Notifications and background scans can be minimized automatically to avoid disrupting gaming sessions.
Pros
- Includes multiple free security features
- Built-in Wi-Fi and network scanner
- Good ransomware behavior monitoring
- Strong secure browsing tools
- Beginner-friendly interface layout
Cons
- Premium upgrade ads can become intrusive
- Higher RAM usage compared to lighter antivirus tools
- Some features feel unnecessary for casual users
- Background services may affect lower-end PCs
Avast Free Antivirus works best for users who want more than basic malware scanning. People looking for additional tools such as network monitoring, ransomware protection, and browser security may prefer Avast over simpler security solutions.
It is also a good option for users who want free antivirus for Windows 11 with broader feature coverage instead of a minimal lightweight setup. Gamers using mid-range or newer hardware may benefit from its gaming-oriented settings, while everyday users can take advantage of its real-time protection and web security tools without needing advanced technical knowledge.
7. Malwarebytes Free
Malwarebytes Free takes a slightly different approach compared to traditional antivirus software. Instead of trying to become a full security suite packed with extra features, it focuses heavily on malware detection and cleanup. That simplicity is one of the main reasons the software remains popular among Windows users dealing with suspicious files, browser hijackers, adware, or infected systems.
Many people use Malwarebytes as a second-opinion scanner alongside another antivirus program rather than as their only line of defense. Even systems already protected by Microsoft Defender or another security suite can occasionally benefit from an additional malware scan, especially when unusual popups, redirects, or suspicious background activity start appearing.
One of Malwarebytes’ biggest strengths is its cleanup capability. The scanner is particularly effective at detecting potentially unwanted programs, hidden malware, browser-based threats, and leftover malicious files that traditional antivirus tools sometimes miss. That makes it useful for users trying to recover infected systems without immediately performing a full Windows reinstall.
The software also keeps things simple. The interface is clean, scans are easy to start, and users are not overwhelmed with advanced technical settings. For people who only want a fast antivirus scanner for Windows 11 without learning complicated security menus, Malwarebytes feels approachable and straightforward.
Performance impact is generally low during regular use because the free version does not constantly run multiple advanced protection modules in the background. However, unlike full real-time antivirus tools, the free edition focuses mainly on on-demand scanning rather than continuous active monitoring.
Even with that limitation, Malwarebytes remains one of the most trusted tools for malware cleanup and emergency scanning. Many users still install it alongside free antivirus for Windows 11 solutions because it works well as a secondary protection layer.
Pros
- Excellent malware cleanup capabilities
- Simple and beginner-friendly interface
- Effective second-opinion scanner
- Fast scanning performance
- Good detection of adware and unwanted programs
Cons
- Free version lacks full real-time protection
- Fewer advanced features than full antivirus suites
- Not ideal as standalone long-term protection
- Some premium upgrade prompts appear inside the app
Malwarebytes Free works best for infected PCs that already show signs of malware activity, suspicious browser behavior, or unwanted background programs. It is also useful for users who want companion protection alongside their primary antivirus software instead of replacing it completely.
People searching for reliable virus protection for Windows 11 often install Malwarebytes as an additional scanner to strengthen existing security setups. While it is not the most complete standalone antivirus solution, its cleanup-focused approach makes it one of the most useful free malware removal tools available for Windows 11 systems today.
Microsoft Defender vs Third-Party Free Antivirus
One of the biggest questions Windows users ask is whether Microsoft Defender alone is enough or if installing another antivirus solution provides better overall protection. The answer depends largely on browsing habits, download behavior, and how much additional security users actually need.
For casual users who mostly browse trusted websites, stream content, and install software carefully, Microsoft Defender already offers solid built-in protection. It integrates directly into Windows 11, runs quietly in the background, and avoids the aggressive advertisements often found in some free security tools. Many people using free antivirus for Windows 11 may never encounter serious malware problems if they maintain safe browsing habits and keep the operating system updated.
However, third-party antivirus software can still provide stronger web filtering, advanced phishing detection, ransomware monitoring, and additional privacy tools. Users who frequently download files, visit unfamiliar websites, or handle sensitive personal data may benefit from those extra layers of protection.
The discussion around third-party antivirus vs windows defender continues because each option has different strengths. Defender usually delivers lower system impact, while third-party security suites often include broader feature coverage and stronger browser-based threat detection.
| Feature | Microsoft Defender | Third-Party Free Antivirus |
|---|---|---|
| Built into Windows 11 | Yes | No |
| Extra Features | Limited | Usually More |
| Ads/Upsells | None | Common |
| Advanced Web Protection | Basic | Better |
| System Impact | Very Low | Varies |
Users also frequently ask: can microsoft defender fully protect windows 11 systems against modern threats? For many people, yes. But users facing higher online risks may still prefer additional protection layers from dedicated antivirus providers.
How to Choose the Right Free Antivirus for Windows 11
Choosing the right security software depends heavily on how the computer is used every day. Some users prioritize performance, while others care more about advanced malware detection or stronger phishing protection. The best choice is not always the antivirus with the most features.
Users with older hardware should prioritize lightweight security tools that avoid excessive CPU and RAM usage. Installing a heavy security suite on weak hardware can slow startup times, increase background activity, and reduce overall responsiveness. For many people searching for antivirus for low-end windows 11 pc systems, lightweight options like Avira or Microsoft Defender usually feel smoother during daily use.
Gamers often care more about performance consistency and minimal interruptions. Frequent notifications, background scans, and heavy updates can affect gaming sessions or increase lag during competitive games. In those situations, antivirus without slowing down computer performance becomes far more important than having dozens of extra security modules running simultaneously.
Office users and remote workers may prioritize phishing protection, browser safety, and ransomware defense instead. Clicking malicious email links or downloading fake attachments remains one of the most common ways malware spreads today. Real-time protection plays a major role here because threats can appear instantly during normal browsing activity.
Choose Based on Your PC Specs
Older laptops and budget desktops generally perform better with lightweight antivirus for Windows 11 solutions. Minimal background activity and efficient scanning help maintain smoother multitasking and faster app launches.
Newer systems with stronger hardware can handle feature-rich security suites more comfortably without noticeable slowdowns.
Consider Real-Time Protection
Real-time protection helps stop malware before it can spread across the system. Antivirus software that only scans files manually may leave users exposed between scans, especially when downloading files or visiting risky websites.
Avoid Heavy Antivirus Suites
Some free antivirus tools include unnecessary extras that increase memory usage and startup times. More features do not always mean better protection. For many users, balanced performance and stable protection matter more than feature overload.
Finding the right free antivirus for Windows 11 often comes down to balancing protection strength, usability, and system performance rather than simply choosing the software with the longest feature list.
Final Verdict
There is no single antivirus solution that works perfectly for every Windows 11 user. Some people prioritize lightweight performance, while others care more about advanced malware detection or extra web security tools. The best option depends on browsing habits, hardware specifications, and personal security preferences.
Microsoft Defender remains a strong choice for casual users who want built-in protection with very low system impact. It works especially well for people who prefer a simple security setup without installing third-party software.
Avira stands out for low-end PCs and older hardware because of its lightweight design and efficient background performance. Users who want free antivirus for Windows 11 without noticeable slowdown will likely appreciate how smoothly it operates during everyday tasks.
Bitdefender continues to offer some of the strongest malware and phishing protection among free security tools. Its detection engine performs extremely well against modern online threats, making it one of the safest choices for users who prioritize protection quality.
Meanwhile, Malwarebytes works best as a cleanup-focused companion scanner rather than a full standalone antivirus replacement. It remains highly effective for removing suspicious programs and scanning infected systems.
Ultimately, the best free antivirus for Windows 11 is the one that balances strong protection with stable system performance. Good security should protect devices without making everyday computer use frustrating or unnecessarily slow.
FAQs About Free Antivirus for Windows 11
Does Windows 11 need antivirus software?
Yes. Even though Windows 11 includes built-in security, malware, phishing pages, and ransomware threats still exist online.
Is Microsoft Defender enough for most users?
For casual browsing and normal daily use, Defender is often enough. Users with riskier browsing habits may prefer additional protection.
Can free antivirus slow down a PC?
Yes. Some security suites use excessive background resources, especially during full scans.
Is free antivirus safe to use?
Trusted security vendors generally provide safe free products, though some include upgrade ads and feature limitations.
What is the lightest free antivirus for Windows 11?
Avira is widely considered one of the lightest security tools currently available.
