The top 5 free antivirus of 2023 to install now

Elizabeth Smith

Protecting computer systems has become a crucial issue, not only for organizations but also for individual users. Every day, millions of new cyber threats emerge, such as malware and viruses, aimed at jeopardizing the security of our data and devices.

Although paid antivirus suites often offer a comprehensive set of advanced services and features, there are numerous free alternatives that offer an absolutely valuable degree of protection.

So let’s examine the best free antiviruses for the year 2023, evaluating not only their functionality but also their effectiveness in detecting threats and their impact on system performance.

1. Avast Antivirus

Avast Antivirus is one of the best-known names in the computer security landscape, and its free version offers a fairly wide range of features that go beyond just scanning and removing malware.

One of its distinguishing features is its intelligent scanning module, which not only looks for viruses and malware, but also identifies vulnerable system settings that could expose your computer to risks.


Avast stands out for the effectiveness of its antivirus engine. Confirmed by a series of independent tests, it can recognize and nullify a wide range of modern viruses and malware, while maintaining a low rate of false positives.

Impact on the system

One of the advantages of Avast is its relatively limited impact on system performance. Because of its lightweight architecture, it is a suitable solution even for older computers or those with limited hardware specifications.

2. AVG Antivirus

AVG Antivirus is another major player in the cybersecurity world, often cited as a reliable and easy-to-use alternative. Its free version is less feature-rich than that of Avast (which, it should be remembered, is AVG’s parent company). But it still offers solid basic protection against malware and other threats.


AVG’s competence in detecting and eliminating malware is impressive, if slightly inferior to Avast’s. Numerous independent testing labs have attested to AVG’s effectiveness against a broad spectrum of malware, although it manifests slightly more false positives than other solutions.

Impact on the system

AVG is known to be lightweight and non-intrusive. The impact on system performance is minimal, making it a good choice for older or less powerful PCs. However, during full scans, you may notice a slight slowdown in performance.

3. Bitdefender Antivirus

Bitdefender is one of the most respected companies in the computer security field, with a history dating back more than two decades. The free version of their antivirus stands out for its advanced features and high-level effectiveness in detecting and neutralizing security threats.


Bitdefender is known for its very high detection rate and its ability to handle a wide range of threats, from viruses to ransomware. It has received high scores from various independent testing labs, making it one of the most effective solutions available.

Impact on the System

Despite its many features, Bitdefender has a relatively low impact on the system, especially when compared to other free antivirus solutions. Scans are fast and can be scheduled to further reduce any intrusion into the user’s normal activity.

4. Kaspersky

Kaspersky is another prominent name in the computer security landscape. The Russian company offers a wide range of products, including a free antivirus option that does not skimp on the basic functionality needed to protect a PC.


Kaspersky has consistently excelled in malware detection tests, frequently achieving scores close to 100 percent. Even in practical scenarios, its abilities to block and eliminate malware have received considerable praise.

Impact on the system

One of the advantages of Kaspersky is its minimal impact on system resources. It does not significantly slow down the PC even during scanning, which is a point in its favor for those who need an antivirus that operates unobtrusively.


It should be noted that, being a free version, Kaspersky offers a limited number of extra features. For example, it lacks a built-in firewall or password manager, features that are often included in other free products.

Read also: Why is Cybersecurity increasingly crucial today

5. McAfee

McAfee is a long-standing brand in the computer security field, founded in 1987. The company has a long tradition of providing antivirus solutions and other security measures. The free offering provides a solid level of protection while minimally affecting system performance.


In numerous tests conducted both in the lab and in real-world environments, McAfee has shown a remarkable ability to detect and neutralize malware. However, when it comes to identifying zero-day threats, it is slightly less effective than some of its direct competitors.

Impact on the system

McAfee is designed to have minimal impact on system performance. Users can run full scans in the background without worrying about significant slowdown of their PC.


The limitations of the free version of McAfee lie mainly in the lack of some extra features such as a firewall or password manager. Also, some users may find the constant reminders to purchase the paid version intrusive.

Read also: Who is a Cybersecurity Architect and how to become one

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