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10 Best Free Antivirus Software for 2021

If you are looking at the best free antivirus software in 2021, here we listed antivirus program for Windows 10 PC and laptops. This is the top-performing antivirus software review list. Antivirus software is the best for solutions to detect and block harmful internet programs that threaten to wreak havoc on your computer.

These antivirus solutions were tested using the Windows 10, Windows 8, Windows 7, Windows XP, Windows Vista and Mac operating system. These antivirus providers also offer a free trial version for the limited time you can easily download for free and check out a product that meets your needs before purchase extended license.

Let’s take a look at best antivirus protection for PC & Mac. Secures your devices against malware and spyware. Resource-light with speed up tools for Windows and Mac computers.

Why you need best antivirus and internet security software – What is antivirus?

Antivirus software detects, and then prevents, disarms or removes malicious programs or malware, often referred to as ‘viruses’. Antivirus doesn’t offer a perfect solution to the problem of malware, but it is a critical first step to securing your PC or laptop. To help prevent viruses from infecting your PC you must install antivirus, and then regularly update your antivirus software.

Antivirus software is necessary on every computer to accesses the Internet on a daily basis. Without antivirus software, your computer could be susceptible to infections that could slow the performance of your computer, keep you from browsing the Internet or even loading programs. You can prevent that by installing antivirus software on your PC. There are many free antivirus programs available for Windows 7, Windows Vista, Windows XP users. All of the antivirus software reviewed here will update automatically. Here is the list of the 10 best free antivirus software to protect your computer.

1. Avira Free Antivirus

Avira Antivirus is technically excellent and takes antivirus protection to a completely new level. This is a hands-down the best free antivirus of 2021. The latest version has undergone some major improvements and now boasts of exceptional detection and blocking rates.

Platform: Windows XP or later; Mac OSX 10.9 (Mavericks) or higher; Android 2.2 or up

2. BitDefender

Free Edition of BitDefender will suit a certain kind of user, one who just wants to install the software and let it do its job, without recourse to setup changes or manually scans. Since it has such a high protection score, it’s safe to do this.

Platform: Windows XP or up; Android 2.3 or up

3. AVG

AVG Free version is one of the best free antivirus programs you can download. It offers a good selection of key protections, though you do have to be careful to install the right product.

Platform: Windows XP or higher; Mac OS X Mountain Lion or Later; Android 2.2 or later

4. Avast

Avast makes an excellent free antivirus offering, giving nobody an excuse to lack protection on a PC and laptop. The latest 2021 version of Avast has witnessed a massive overhaul in the appearance.

Platform: Windows XP, Windows 7, Windows 10, Windows 8; Almost all Mac OSX versions

5. Comodo

Comodo Antivirus is resilient enough to withstand virus threats and malware attacks, and granular enough to scan all suspicious files and processes hiding in the deep crevices of a computer.

Platform: Windows XP or higher (Windows 10); Mac OS X 10.4 or above; Android 2.2 and Up

6. Windows Defender & Microsoft Security Essentials

Windows Defender antivirus is the best free antivirus software. It provides on-access/resident protection from viruses, spyware and other malware as well. There is still a lot of scope for improvement in terms of system performance and virus protection.

Platform: Windows XP, Windows Vista, Windows7, Windows 8 and Windows 10

7. Panda

Panda is one of the leading antivirus providers and this free offering real-time updates. We were surprised at the time it took for both the initial and follow-up test scans, but its protection levels are sound and it’s very easy software to set up.

Platform: Windows XP or higher; Android 2.3 or up

8. Qihoo 360 Total Security

If you want the extra features that Total Security 2021 offers over and above a plain free antivirus product, then Qihoo isn’t a bad choice. And if you do install it, you should head straight into the settings and enable the Bitdefender scanner.

Platform: Windows XP or higher (Windows 10); Mac OS X 10.7 or later including OS X Yosemite; Android 2.2 and Up

9. AdAware Free Antivirus

AdAware is a pretty reliable free antivirus but we feel that a major drawback associated with it is the lack of features that are readily available in its paid-for siblings.

Platform: Windows XP or higher version

10. Zone Alarm Free Antivirus

Zone Alarm Antivirus is the new on the list. It boasts of a built-in and highly efficient firewall along with features such as kernel level virus prevention, automatic updates and a web security and privacy toolbar.

Platform: Windows XP or higher

Read also: 5 Best Antivirus for iPhone and iPad Apps of 2021

Antivirus and Anti-Spyware

  • Detects and removes viruses, spyware, Trojan horses, worms, bots and more.
  • Independently tested for superior protection.
  • Protects your operating system with kernel-level virus prevention.
  • Enables you to customize your protection with Scan Modes.
  • Daily signature update detects and stops recent viruses that others miss.

Basic Firewall

  • Stops Internet attacks at the front door and catches thieves on their way out.
  • Proactively protects against inbound and outbound attacks.
  • Monitors and blocks both inbound and outbound threat traffic.
  • Makes you invisible to hackers through Full Stealth Mode.
  • Instantly disables malicious programs with Kill Controls.

Additional Layers

  • Multiple layers of advanced protection provide unsurpassed security.
  • Detects wireless networks and automatically applies the most secure firewall protection setting.
  • Provides real-time security updates, responds quickly to breaking threats, and leveraging threat data from millions of users.

Written by Kirushananthan