Antivirus software has become an important tool for safeguarding personal and professional data. Whether you’re using a Windows or Mac computer, having an antivirus program installed ensures protection from viruses, malware, spyware, phishing attacks, and other online threats.
Attacks from viruses can come when opening emails or downloading or sharing files via flash drives and other devices. Certainly, no one wants to experience this, which is why using an antivirus is a must-have on your computer.
In this article on Naijaknowhow, we’ll explore some of the best antivirus software you can download on Windows and Mac computers, ranging from lightweight options to feature-rich premium solutions.
Top Antivirus Software for Windows and macOS
1. Avira Free Security Suite
Avira is one of the lightest and most efficient antivirus solutions available today. Even in its free version, it offers a solid range of features that many other free antivirus tools don’t provide. It’s capable of protecting your PC from a wide array of threats including viruses, spyware, adware, backdoor programs, and even unknown malware thanks to its proactive detection technology.
What sets Avira apart is its ability to identify emerging threats early, offering protection against viruses that haven’t yet been widely catalogued. It also comes with unique tools such as a built-in VPN, software updater, and privacy optimisation features, making it a comprehensive security suite for personal use.
Pros:
- Strong protection against both common and advanced threats
- Automatically detects and handles new or unknown viruses
Cons:
- Free version is limited to personal, non-commercial use
- Installation process is slower compared to other antivirus software
- Some real-time notifications can become intrusive
2. Avast Free Antivirus
Avast is known for being one of the most lightweight and reliable antivirus options available. It offers excellent protection and security, even with its free version. In addition to supporting Windows PCs, Avast also works effectively on iOS and Android devices.
The antivirus is packed with several helpful features. These include CyberCapture, which automatically detects and removes threats, and Wi-Fi Inspector, which checks your network for vulnerabilities. Avast also comes with Smart Scan for identifying potential risks, Game Mode to reduce interruptions while gaming, and Behavior Shield, which monitors app activity for suspicious behaviour.
It supports a wide range of Windows versions, including XP, Vista, Windows 7, 8, and 10. This versatility makes it a solid option for users on older systems.
We also featured Avast in one of our previous guides on Best Android Privacy Apps, so feel free to check that out if you’re interested in mobile protection too.
Pros:
- Comprehensive security tools including real-time scanning
- Built-in password manager for securing your accounts
Cons:
- Pop-up ads frequently appear promoting Avast products
- Sometimes installs unrelated software during updates
3. AVG Antivirus
AVG Free Antivirus has been a trusted name in PC security for many years. Officially acquired by Avast Software in 2016, AVG continues to offer a reliable and effective antivirus solution. It provides essential protection features, including real-time security updates and web protection that keeps your browsing safe.
One of AVG’s standout features is its cautious approach to virus detection. Instead of immediately deleting suspicious files, it moves them to quarantine, allowing users to review and restore them if needed. It also scans the security of links on websites in real-time, helping you avoid phishing sites and malicious content.
Pros:
- Safe handling of suspicious files by quarantining instead of automatic deletion
- Real-time scanning and security updates
- Effective web protection that checks links during browsing
Cons:
- Sometimes misidentifies executable (.exe) files as viruses
- Interface and feature navigation may feel complicated for some users
4. Smadav
Smadav is a lightweight antivirus application developed in Indonesia. It is designed primarily to combat local viruses that are commonly found in the region. While it is not a full-featured antivirus solution, Smadav works well as a complementary layer of protection alongside your main antivirus software.
Its strength lies in detecting and cleaning stubborn local threats, and it also provides solid protection for external storage devices like flash drives and memory cards. However, it does not offer much protection against more advanced or global threats.
Pros:
- Effective in detecting and removing local viruses
- Offers reliable protection for external devices such as USB drives and memory cards
- Very lightweight and runs well on low-end systems
Cons:
- Limited to handling local threats only
- Lacks protection against more complex or international malware
5. Comodo Antivirus
Comodo Antivirus is a lightweight and free antivirus program tailored for Windows users. It provides essential protection against common threats like viruses, malware, and phishing attacks. Comodo uses real-time scanning to detect suspicious activity and also includes malicious URL blocking to safeguard users while browsing the web.
While it may not have as many advanced features as some premium antivirus solutions, it still delivers solid protection for everyday users who want a simple, effective security tool without overloading system resources.
Pros:
- Lightweight and free to use
- Compatible with a wide range of Windows versions
- Includes basic phishing and malicious URL protection
Cons:
- Lacks more advanced or premium features
- May not be ideal for users needing high-level customization or enterprise tools
6. Sophos Home
Sophos Home is a powerful antivirus solution designed not just for individual users but for entire households. It provides robust protection across multiple devices, making it ideal for families or users with several computers. Sophos Home helps defend against malware, ransomware, keyloggers, and other online threats while also blocking access to dangerous or compromised websites.
One of its standout features is the ability to manage and protect up to 10 devices simultaneously, whether they’re running on Windows or macOS. This makes it a convenient choice for homes with multiple users and devices that need dependable, centralised security.
Pros:
- Effectively blocks harmful websites and URLs
- Strong protection against ransomware, keyloggers, and advanced malware
- Allows remote security management for up to 10 devices
Cons:
- The interface and features may be confusing for beginners
- Requires some technical understanding to use it effectively
7. 360 Total Security Antivirus
360 Total Security is one of the most feature-rich antivirus programs available today. It combines strong protection with a lightweight design, making it a popular choice for users who want both security and performance. This antivirus offers a solid level of defence against threats like viruses, malware, and phishing attempts.
What sets it apart is its wide range of built-in features. In addition to essentials like Web Protection and automatic file scanning, it includes system cleanup tools, performance boosters, and more. All of these come together to help keep your PC running smoothly and securely.
Pros:
- Offers a very comprehensive set of features
- Automatically scans new or transferred files for potential threats
- Includes system tuning and cleanup tools
Cons:
- The user interface may feel cluttered or overwhelming, especially for beginners
- Some extra features might not be useful for everyone
8. Microsoft Defender
If you’re using a Windows 10 or Windows 11 PC, chances are you’re already protected by Microsoft Defender. It is the antivirus that comes built into your system. It’s Microsoft’s way of making sure your PC stays safe without you having to lift a finger.
This tool offers basic but reliable protection against everyday threats like viruses, malware, spyware, and suspicious files from emails, apps, or websites. It’s always running in the background, updating automatically, and scanning files in real-time to keep your PC secure.
The good part? You don’t need to download or install anything extra. It is there from the moment you set up your Windows PC. For casual users who just want peace of mind without the fuss, Microsoft Defender does a pretty decent job.
Pros:
- Comes pre-installed on all Windows PCs, no extra download needed
- Offers automatic updates and real-time scanning
- Simple interface that’s easy to use, even for beginners
Cons:
- Not the best option if you need heavy-duty or enterprise-level protection
- No dedicated support if malware slips through
- Can slow down app installations or updates sometimes
Final Thoughts
Choosing the right antivirus depends on your needs. For basic use, tools like Avira, Avast, or Microsoft Defender work great. If you need protection across multiple devices, Sophos Home is a solid choice. Meanwhile, 360 Total Security offers system performance tools alongside antivirus protection.
What about windows defender?
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