Why should you install antivirus software in your system? To protect your system from any type of malware, yes! Before you consume the paid version of costly software you can use its free version and make an experiment with its usage. Do you have any idea about free Antivirus software? If you are looking for the best free antivirus for 2021, then we like to inform you that we have tried to cover this entire topic based on the critic’s analysis.

Protect your system with a premium security guard wall – Avast, one of the topmost preferable antivirus software as per user’s choice. With its most advanced-level protection keys ensure the security of your system through ransomware, zero-day threats, toughest defense against malware, domestic Wi-Fi network vulnerabilities, and more exciting attachments.

Device Supported: Windows, Android, Mac, iPhone/iPad

• Intel Pentium 4
• 256 MB RAM
• AMD Athlon 64 or better
• 2 GB free disk

In the term of basic protection of your system, Avast is the best antivirus software available in the global market. Avast can grab the highest score on the track of international protection tests. In 2019, Avast upgrades its features and developed its level which leads the software in the best choice for 2021. Apart from the free services, you can avail of its Premier, Ultimate, and Premium scheme in $79.99, $119.99, $49.99 respectively on a monthly basis.

• Bitdefender vs Kaspersky – Which Antivirus You Will Choose?

• Sandbox
• Intelligent antivirus
• CyberCapture
• Smart Scan
• Data Shredder
• Anti-spam
• Passwords
• Browser Cleanup

• Network Security keys
• Password manager
• Independent protection prevents dangerous URLs
• Free programming
• User-friendly
• Bonus features attached regarding security purpose
• Modern and clean interface

• Full protection available only in Firefox and Chrome
• Password managing features are limited
• Some extra features require purchase

Kaspersky is another top preferable free antivirus software in the market. Its free antivirus offers full-scale malware protection abilities and a handful of suite-level advance features. The most surprising fact is that Kaspersky scores satisfactory marks in our independent lab. It provides real-time protection, detection of malware, removals of worms, viruses, Trojans, key loggers, adware, and different types of malicious tools. You can get an automatic update tool in this software that can run through the “Kaspersky Security Network” program. The Kaspersky engine can defend 100% real-world malware exposures by its intended features across 2 successive months trials.

Devices Supported: Android, Windows & iOS

• 64MB Intel GMA950 video card
• Screen resolution: 1024X600MP

1. Data Protection
2. Restricted web policies for users to become secure
3. It provides Data Backup for its users, by which you can find your lost data from the history and build a backup to protect your data.
4. Strong Password manager
5. End-to-end data encryption
6. Through an advance-level of Network monitoring tool, you can proceed with your visual representation on your subordinate networks.
7. Management controlling keyguards
8. Some additional Auxiliary tools are present to enhance its security level.

• Pop-up free detection mode
• Perfect tools as per lab-report
• User-friendly
• Globally accepted
• Malicious URL blocking ability

• Direct tech doesn’t support
• The free version needs more updates.

Two major selling points are present in AVG antivirus software. The first benefit is that it helps you to detect malicious viruses and malware effectively and also helps to block unwanted and suspicious links, prevent virus affected downloads, prevent suspicious email attachments to protect your system from the attack of foreign bodies. The second benefit of AVG is its advanced-level android download key. This key helps you to scan your system as well as any foreign attachment via its auto-scanning tool.

AVG needs regular updates via domestic Wi-Fi to enhance its performance in the field of malware detection. One amazing fact of AVG is that it can enhance the speed level of your machine after completing the auto-scan. The main benefits of AVG are its smart scanner, security guard wall, anti-theft key, and camera trapping features. There are two special integrations Autotask, tiger paw are recently added in this software to develop its functions and workabilities.  Apart from this free version, you will find its premium version which needs a monthly subscription.

Device Supported: Windows 7/8/10, Android, iOS, Mac

• Anti-theft
• Device Lock
• App Backup
• Ransomware Protection
• Smart Scanner
• App lock
• Link Scanner
• Email Shield
• Identity protection

• Pop-up free malware detection mode
• Effective keys to prevent malware from restricted URLs

• There are some rivals in the market with more ability
• Default options need more development to work like Avast.

The free version of Bitdefender Antivirus revels in an essential attachment design that needs minimum maintenance efforts to run properly. The application features of this antivirus software run without consuming extra configuration. It can scan automatically on your system to prevent the entering of any kind of foreign malware. It bundled with a real-time virus shield which helps you to block malicious URLs and some unwanted emails. Recently the company attached an advance level filter that warns you while entering a malware URL.

Device Supported: Android, Windows & iOS

• Intel Pentium 4
• 256 RAM
• AMD Athlon 64 or better
• 2 GB free disk

Protect your system with Bitdefender antivirus and make a  strong guard wall in your machine. It is best for those who like to stream a large number of video files and run advanced level software frequently. In the term of basic protection of your system, Bitdefender is one of the best antivirus software available in the market. It can achieve the highest score on track of international protection tests. In 2019, Bitfinder upgrades its entire features and developed the level that leads this antivirus software in the best choice for 2021.

• Safe files tools
• Advanced threat detecting and defending tool
• Webcam protection
• Secure browsing
• Fraud detection tool
• Privacy firewall
• Strong password manager
• File shredder
• Social network protection

• Excellent scores by a lab report
• Easy to install
• User-friendly
• Advance anti-shipping score

• Core protection shield is unavailable

Avira is free antivirus software that gets an excellent rating from its users and the independent labs. The interface Avira is surprisingly compact. It has an open on-tab display that protects the status of your system and provides the best level of security from unwanted trespassing.

Device Supported: Windows 7/8/10, Android, iOS, Mac

• 1GB RAM
• 1GHz Intel Premium 4
• 2GB free disk

• Night vision (automated intelligence protect your system against new threats)
• Antivirus Scanner ( it can detect ransomware, viruses, banker Trojans, and more)
• Browser tracker (helps you to protect from outsider monitoring)
• PUA shield (helps you to identify the unwanted applications which are hidden within any legitimate software)
• Ad Blocker (Prevent malicious and intrusive ads. Pop-ups from long term loading)

• Simple installation process
• Easy to set-up
• Web guard module
• Good malware detection efficiency
• Low impact on high volume system load

• Silent detection modes are unavailable
• Avira’s free version needs some extra tools to enhance its level.

Microsoft Window Defender is another best virus protection software that includes multiple numbers of beneficial attachments in a single bracket. You can run this software for any type of Windows operating system. Its positive impact on system performance is not so bad. Its level of performance is stronger than other free versions of antivirus local software. With a strong firewall guard, it can detect unwanted malware from different URLs.  From this article, we have summarized the Best Antivirus software for you but please go through our entire analysis properly.

• 1GB RAM
• 500MB hard disk space
• Screen resolution: 800X600

• Threat Track Vipre to prevent immigration of foreign malware.
• Verified malware protection to provide a strong shield against malware URLs.
• Excellent Phishing protection that enhances the level of total security keys
• Simple Ransomware Protection
• Security center

• Excellent performance in Windows 10 interface
• Outstanding malware detection performance
• Third-party software is not needed

• System getting slower sometimes

From this above discussion, we have seen that different types of free antivirus software are available in the market but all of those are not considered as the best ones. We have shortlisted some of them in the best 5 categories.  As per the user’s choice and critic’s opinion, we recommend Kaspersky free antivirus software for its best overall packages.