11 Best Lightweight Antivirus for Windows 11,10 and 7 PC in 2021

Are you fed up with the antivirus that is consuming a lot of system resources? Are you in search of lighter antivirus that could remove viruses from your system without taking a lot of resources? Then you have landed on the right platform. We are here to resolve your problem and present a list of the best Lightweight antivirus that would help in detecting viruses and removing all of them including malware. 

Most of the antivirus uses a lot of RAM and also are expensive. They can make the system slower that is why people are looking for lightweight antivirus so that the virus detection would become easier without getting several errors that you face in another antivirus. 

Lightweight Antivirus for Windows 11, 10, 8 and 7 PC is capable of detecting malware, spyware, Trojans, keyloggers, rootkits and viruses and is able to block and remove them. The lightweight antivirus comes with several tools that can alert users from phishing attacks and other activities that will harm your system. In this article, we have discussed the best lightweight antivirus for Windows 10 that will make your system virus-free and also takes up less memory. Let’s read the further article for more information.

Best Lightweight Antivirus for Windows 11, 10 and 7 PC

1. Bitdefender

Bitdefender Antivirus is the most lightweight Antivirus in the list that consumes very little memory and detects all types of viruses and malware that can harm your system badly. The antivirus is the best tool for you to protect your data and memory from theft or loss. It can easily detect any type of virus and remove it completely from your PC. The antivirus software is equipped with AI and cutting edge technology. It has some of the best features like camera protection, a built-in password manager and many more. If you want to have a lightweight antivirus that offers multilayer protection to protect your system against cyberattacks then Bitdefender is the best option for you.

Bitdefender Antivirus Free Edition


  • It has a webcam protection feature 
  • Built-in password manager
  • It can run in the background without affecting the speed of the PC 
  • It offers multilayer protection 

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2. BullGuard Antivirus

Another name in the list of best lightweight antivirus comes is Bull Guard. It is software that offers multilayer protection by quickly identifying malicious activities in your PC. This tool uses advanced machine learning and deep learning technologies to detect malware. It removes all the existing viruses and malware and protects PCs against future cyber attacks. The antivirus has a game booster feature that is able to increase CPU performance while playing GPU intensive games. It alerts you when you enter phishing websites and protects against network attacks.

Lightweight Antivirus For Windows 10


  • Provides triple layer protection 
  • It optimizes and boosts the games
  • Secure browser 
  • It has a Vulnerability Scanner.
  • This software has a Network Scanner.

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3. Avast Antivirus

Avast Antivirus is the best lightweight antivirus that provides security against malware, virus, Trojans and other harmful files that can severely damage your PC. Antivirus has the largest threat detection network in the market. Avast antivirus offers several amazing features like real-time checking files, encrypting passwords, identifying and preventing malware, phishing attempts, ransomware, etc. The software offers great security against cyber threats and doesn’t consume a lot of system memory.

Avast free antivirus 


  • It protects passwords by encrypting them.
  • Real-time scanning files and sending threats to the cloud
  • It uses smart analytics techniques and machine learning technology to protect the system 
  • It detects and blocks spyware, ransomware and phishing attacks 

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4. McAfee

Mcafee, one of the best lightweight antivirus on the list offers the best features like a password manager, safe web browsing, home network security and a lot more. The software is appropriate for Windows as well as Mac platforms. But there is one drawback of the Mcafee antivirus is that it doesn’t offer any free malware removal feature and you need to take its subscription to use it. It offers several types of plans like a single device, individual/couple and family plan you can purchase according to your need. The lightweight antivirus protects your system against malware and other threats that harms your PC without taking a lot of computer memory.

Antivirus Software For Windows 10


  • Bank-grade VPN encryption 
  • Alerts you for fraud and malicious sites 
  • Bank, shop, and browse tension free on Wi-fi 
  • Home network security
  • Safe web browsing 

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5. Kaspersky Antivirus

Kaspersky Antivirus is the popular lightweight antivirus for Windows 10 and other versions that could be the best solution to detect and remove malware and viruses without taking a lot of system resources. The antivirus software offers many exclusive features like crypto lockers, data backup and many more. Along with malware detection and removal, the antivirus also offers email scanning and real-time scanning features. The software is able to protect against spyware, Trojans, worms, adware, auto-dialers and other types of treats.

Kaspersky Antivirus


  • It has extensive parental control tools as well as a VPN option for data encryption.
  • It provides bank-grade security to secure net banking usage.
  • This software offers real-time scanning and email scanning 
  • It offers webcam security 
  • Data encryption feature 
  • It offers Kaspersky security cloud to store data and manage passwords

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6. Avira

Avira Free Antivirus is the best solution for Windows PC to protect against malware, ransomware, Trojans, viruses, worms and many other cyber threats. Although the free version is equipped with several amazing features but its pro version you will get some of the advanced features like scan email attachments, unlimited customer support, scans USB devices, scans downloads, torrents and cloud storage. The antivirus protects your personal data, your software, browsing, searches and home network. It offers real-time protection against malware and online threats. 

Avira Antivirus Software 


  • Because of its capacity to function in the cloud, it requires significantly less system resources.
  • It runs in the cloud and is thus significantly quicker.
  • This software offers excellent protection against phishing schemes.
  • It provides useful Firefox browser add-ons and shopping Chrome.
  • Browser safety 
  • Password manager 
  • Web protection 
  • Performance optimization tools 
  • It offers safe shopping 

7. Panda Free Antivirus 

Panda Free antivirus is another amazing lightweight antivirus for Windows 10 that can quickly detect and block all those malicious files that harm your PC. The antivirus comes with an intuitive dashboard that makes the antivirus best for beginners. It is easy to use and has a simple user interface. An antivirus is a free tool with a data limit of 150 MB per day but if you want unlimited free VPN data you can get the Panda dome premium plan. Being a lightweight antivirus it takes a few system resources and also protects the PC against several harmful viruses to enter your PC.

Most Lightweight Antivirus


  • Malware protection 
  • Web protection 
  • Password manager 
  • Virtual private network 
  • Gaming mode 

8. Comodo

Comodo free antivirus offers complete protection against malware and viruses. It deals with the daily malicious files, phishing attacks and cyber-attacks and provides a shield against harmful viruses. It protects your personal files and financial information from viruses and hackers. The antivirus can scan and blocks malware, spam and other cyber threats. Whenever you enter into a dangerous site the antivirus warns you and prevents you from risky downloading.

Comodo Internet Security


  • It has the ability to sandbox unknown applications.
  • It guards against host infiltration.
  • This software enables on-demand, on-access, and boot-time scanning.
  • It provides exceptional internet security.
  • Cloud-based antivirus 
  • Auto sandbox technology 
  • Spyware scanning 
  • Personalized protection alerts 

9. Adaware

The latest version of Adaware Antivirus Free promises to eliminate all forms of viruses. Its ratings improved in our most recent review, but it still lacks several features seen in the top free rivals. The commercial editions of Adaware include sophisticated techniques such as behavior-based detection, whereas the free edition depends mainly on pattern recognition.

Lightweight Antivirus


  • It thoroughly analyses your computer for harmful software such as blended malware, Trojans, worms, backdoors, rootkits, hijackers, and intrusive spyware.
  • It provides real-time protection.
  • This software keeps track of the processes that are operating on your computer.
  • It provides an Internet filter as well as parental control software for your computer.

10. 360 Total Security

One of the popular names in the lightweight antivirus is 360 Total security. It is the leading name because it offers exclusive protection against cyber attacks. This tool offers the best solution for PC security and performance. It consumes fewer system resources and protects your system from dangerous websites. The antivirus also has the ability to remove trash files and free up disk space and speed up your system performance. It also tracks user activity to identify document hijacking.

Lightweight Antivirus for Windows 10


  • It prevents websites from monitoring your online behaviour and protects you from targeted advertising and privacy breaches.
  • It includes a Data Shredder that completely destroys deleted files.
  • This software includes a Privacy Cleaner that completely eliminates all traces of your activity, including browser history, application activities, and system run history.
  • It features a Driver Updater that makes it simple to maintain all of your drivers up to date.
  • Anti-ransomware arsenal

11. AVG Free Antivirus 

AVG Free Antivirus is another popular lightweight antivirus for Windows 10 that is able to detect and remove all types of malware and virus from your PC. It protects the PC from cyber attacks. Whenever you open a site it aware you if it is malicious or harmful. It also detects harmful files and prevents you from downloading them. The antivirus software offers real-time security updates and also boosts the performance of your computer. The antivirus is capable of protecting your device against viruses, adware, malware, Trojans, rootkits, etc. It also protects the system from cyber-attacks caused by email attachments.

AVG AntiVirus FREE.


  • It offers an anti-theft feature for mobile 
  • Ransomware protection 
  • App backup 
  • Smart scanner 

FAQ 0n Lightweight Antivirus for Windows 10 PC

Which is the best lightweight antivirus?

Several antivirus are available that are lightweight and consumes very few system resources. In the above article, we have listed the best lightweight antivirus you can read the above article for more information. Some of the best lightweight antivirus are AVG free antivirus, Avast free antivirus, Bitdefender, Kaspersky antivirus and Panda security. 

Which antivirus slows down computers the least?

The antivirus can protect your PC from malware, virus, phishing attacks and malicious sites. But the antivirus consumes a lot of system resources and slows down the PC at the same time. To avoid this situation you need to have a lightweight antivirus that can scan and remove the virus and protect your system against malicious activities also consumes very little memory. One of the best lightweight antivirus is Bitdefender that offers multilayer protection to your system and consumes less system memory. 

Is Avira Free lightweight?

Yes, Avira is a free lightweight antivirus that protects your system against viruses. It is an award-winning antivirus for Windows, Mac, Android and iOS. It also offers a pro version with some additional features. 

Is there a lighter antivirus than Windows Defender?

There are many lightweight antivirus available in the market nowadays. If you are in search of a lighter antivirus than Windows Defender then you can have a reference for the above article. We have listed some of the topmost lightweight antiviruses in the article. 

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