Top Free Antivirus Tools in 2025

There are hundreds of antivirus programs available on the internet, and they all claim to provide the best protection at the best price, but only a few of them are secure, strong, and effective enough to be considered for the best antiviruses of 2025. 

Top antiviruses in the market - I found 4 antivirus software that are excellent and free. Read this article and learn more about each of them, and then decide which is best for you.

1. Avira Free Antivirus—

Best Overall Protection 

The free version of Avira antivirus uses the same antivirus engine as the paid version of Avira. It consistently receives high rankings in all AV-Test categories. You will be able to perform real-time protection as well as manual scans, and you can also schedule scans on a daily or weekly basis. Visit the official site.

Features

• Phishing protection, ransomware protection, 

• Specialized browser, safe browsing extension 

• Password manager

• Software updater for windows 

• Manual scan, automated scan and scan scheduling

Specs & Configuration

• Operating system - Windows, MacOS, Android, iOS

• Maximum device covered - One

  
  

Pros 

• Real-time protection

• Safe browsing tools

• Phishing and ransomware protection

• Software updater

• Password manager

• Apps are available for Windows. iOS, macOS, and Android

Cons

• Dashboards has some aggressive upsells

• Some tools of avira are only available for windows users

2. Microsoft Defender—

Best Free Antivirus for Windows

Microsoft Defender, which is also known as Windows Defender, is basically built into Windows 10 and 11 and enabled by default.

Microsoft Defender has high marks from AV-Test. To ensure protection from new malware, the program is updated regularly. Windows Defender provides real-time protection and runs automated scans.

Features

• Automatic installation on Windows 10 and 11 devices

• Controlled folder access

• Manual scan and automated scan

Specs & Configuration

• Operating system - Windows 10 and 11

• Maximum device covered - Unlimited

  
  

Pros

• Enabled by default and built into windows 10 and 11

• Real-time protection

• Regularly updated

Cons

• Resource intensive

• Ransomware protection is limited

• No option to schedule scans manually

3. Bitdefender Antivirus Free Edition—

Best for Real-Time Protection on Windows PCs 

The free edition of Bitdefender Antivirus provides real-time protection against malware like viruses, ransomware, and spyware. The regular score of Bitdefender antivirus is 6 out of 6 in the protection ranking from AV-Test Lab. It has a high ranking for performance and usability. You will get the option to run manual scans and schedule daily, weekly, or monthly scans. Download here

Features

• Ransomware protection 

• 6/6 AV test ranking

• Manual scan, automated scan and manual scheduling

Specs & Configuration

• Operating system - Windows, MacOS, Android, iOS

• Maximum device covered - One

  
  

Pros

• Real-time protection

• Ability to schedule scans

• Live customer support available for free users

• Lightweight and easy on PC resources

Cons

• The first scan takes a long time

4. AVG Antivirus Free—

Best Free Cross-Platform Antivirus

The paid AVG Internet Security and AVG Antivirus Free both use the same antivirus cores. The only difference is that AVG Internet Security provides a full suite of tools like an enhanced firewall and webcam protection. AVG has a high score in all three AV-Test categories.

Features

• Phishing protection, ransomware protection

• Specialized browser, safe browsing extension

• Software updater for windows

• Password manager

• Manual scan, automated scan and scan scheduling

Specs & Configuration

• Operating system - Windows, MacOS, Android, iOS

• Maximum device covered - One

  
  

Pros

• Provide real-time protection

• Scan scheduling tool

• Has browser extension to block third-party tracking and malicious websites

• Available for MacOS, Windows, and Android

• Phishing and ransomware protection

Cons

•  Aggressively sell their paid subscription if you click on certain features or try to perform smart scan

Comparison of Best Free Antivirus Software

Name	Antivirus features	Additional security feature	Maximum devices	Paid version available
Avira free antivirus	Manual scan,  Automated scan Scan scheduling	Phishing protection, ransomware protection, specialized browser, safe browsing extension, password manager and software updater for windows	one	Yes , starting at $35 for the first year
Microsoft defender	Manual scan, Automated scan	N/A	Unlimited	No, it's free on all windows devices
Bitdefender free antivirus	Manual scan, automated scan, scan scheduling	N/A	One	Yes, Starting at $25 for the first year
AVG antivirus free	Manual scan, automated scan, scan scheduling	Phishing protection, ransomware protection, specialized browser, safe browsing extension, software updater for windows, password manager	One	Yes, Starting at $60 for the first year

Understanding Features of Free Antivirus Software

Antivirus offers two layers of protection

Real-time protection—this protection identifies and blocks malware and protects it from being downloaded into your computer.

Scans—this searches your computer and then removes malware. Some tools let you schedule this by yourself. You can also manually scan your computer at any time.