The 10 best tools for securing your PC

The best tools for securing your PC in 2026 are Microsoft Defender Antivirus, Avast, AVG, Bitdefender, ESET, F-Secure, Malwarebytes, McAfee, Norton, and TotalAV. All scored at least 17.5/18 in the AV-TEST test from August 2026. For everyday use, Microsoft Defender may be sufficient; a paid suite is primarily justified by its additional services and support for managing multiple devices.

What are the 10 best tools for securing your PC?

The ten tools for securing your PC selected here appear in both the AV-TEST and AV-Comparatives Windows 2026 evaluations. Eight scored 18/18 with AV-TEST in August 2026. Microsoft Defender Antivirus and TotalAV scored 17.5/18, also meeting the “TOP PRODUCT” threshold set by the labor.

An antivirus is software that detects, blocks, and removes malicious programs. Security suites sometimes add a virtual private network, or VPN (encrypted connection), a password manager, online backup, or identity protection features.

These scores do not establish an absolute ranking. AV-TEST divides its 18 points among protection, performance, and usability. In August 2026, Microsoft Defender Antivirus therefore received 6/6 for protection, 5.5/6 for performance, and 6/6 for usability.

AV-Comparatives provides a different perspective through real-world usage scenarios. Its March 2026 test, porformed on 10,000 samples, measured 99.98 % online protection for F-Secure and TotalAV, 99.97 % for Avast, AVG, and Norton, 99.94 % for Bitdefender, and 99.93 % for ESET. At this level, additional features and usage constraints become decisive.

Is Microsoft Defender enough to protect Windows 11?

Microsoft Defender Antivirus is often sufficient for a well-updated Windows 11 PC used cautiously. Included with Windows 11, Microsoft Defender Antivirus provides real-time, comportemental, and heuristic protection in 2026. Its score of 17.5/18 from AV-TEST in August 2026 places it at the “TOP PRODUCT” level.

Comportemental protection monitors a program’s suspicious actions, while heuristic analysis looks for characteristics typical of an encor unknown threat. This combination avoids relying solely on a list of viruses that have already been identorified.

For an executive, the main advantage is financial: no additional antivirus subscription is required. Management also remains simple. According to Microsoft’s 2026 documentation, Microsoft Defender Antivirus automatically steps aside lors when another active antivirus is installed, avoiding the deliberate operation of two primary protections in parallel.

The pitfall lies less in the antivirus engine than in user behavior. A fraudulent file approved by the user, a reused password, or unpatched software can bypass an otherwise well-rated defense. A policy of controlled software updates therefore complements Microsoft Defender better than a second antivirus.

Should you choose a free antivirus or a paid suite?

A free antivirus is suitable for a personal PC lorsque when the need is limited to threat detection. A paid suite becomes relevant for multiple devices or to obtain a VPN, backup, a password manager, and identity protection. Antivirus protection alone therefore does not always explain the cost difference.

In 2026, Avast Free Antivirus offers real-time shields for files, comportement, and the web. The software also searches for vulnerable programs and network problems. AVG AntiVirus Free is another option, but AV-Comparatives states in 2026 that AVG uses the Avast engine: the two brands therefore do not represent two entirely independent technologies.

Malwarebytes clearly illustrates the line between free and paid. According to its documentation updated on September 8, 2026, Malwarebytes Free provides quick and custom scans. Real-time monitoring, web protection, scheduled scans, and threat analysis require a paid subscription.

Bundled plans should be examined feature by feature. In May 2026, ESET Security Ultimate combined antivirus, VPN, password manager, and identity protection. The U.S. Norton 360 Deluxe plan cited in 2026 covered up to five devices, with a VPN and 50 GB of cloud backup for PC. The French-language content and renewal price should be verified before purchase.

Honestly, a complete suite is justified only if you actually use its services. If your only additional need is to encrypt a connection on a public network, it is better to compare free and paid VPNs separately rather than choosing an antivirus based on the presence of a poorly documented VPN.

How can you choose an antivirus without slowing down your PC?

To choose an antivirus without slowing down your PC, compare the independent performance rating, system requirements, and enabled features. AV-TEST awards up to 6 points for performance. In August 2026, Microsoft Defender Antivirus scored 5.5/6 in this category, compared with an overall score of 17.5/18.

A perfect overall score does not guarantee the same experience on every machine. The age of the processor, the amount of RAM, storage, and scans running in the background all affect the experience. Bitdefender Total Security, for example, requires 2 GB of RAM and 2.5 GB of disk space on Windows, according to its 2026 documentation.

Before choosing among tools to secure your PC, check the following:

• the officially supported version of Windows;
• the performance rating published by an independent laboratory in 2026;
• whether web and behavioral protection are included, not just manual scanning;
• the number of devices actually covered by the license;
• the features included with the initial purchase and renewal;
• how easy the alerts are to understand, to prevent users from systematically ignoring them.

From an agency perspective, the first step is to check compatibility and the update cycle, followed by the list of features. A feature-rich antivirus installed on an older PC may prompt the user to disable disruptive modules. At that point, a more streamlined and correctly configured solution provides better protection.

Bitdefender Total Security remains relevant for older computers because it supports Windows 7 SP1 through Windows 11 in 2026. However, this does not make an old system as secure as one that is still maintained. To understand the platform’s logic, thehistory of the Windows system provides useful insight into its development.

How should AV-TEST and AV-Comparatives tests be interpreted?

AV-TEST and AV-Comparatives evaluate antivirus products according to different protocols; their results should be considered together. AV-TEST rates protection, performance, and usability on a scale of 18 points. AV-Comparatives measures, among other things, protection under real-world conditions and against samples of malicious software.

In August 2026, all ten products compared reached AV-TEST’s “TOP PRODUCT” threshold, set at 17.5/18. Eight received 18/18. This narrow spread means that a 0.5-point difference alone is not enough to justify switching products or paying for a more expensive subscription.

The volume and date of the protocol matter. In September 2026, AV-Comparatives published a report based on 200 Windows cases observed during July and August 2026. Its March 2026 malware test used 10,000 samples. These two measurements address different questions and should not be confused.

Another nuance that is easy to overlook: several brands may share the same detection engine. In 2026, AV-Comparatives noted that AVG and Norton use the Avast engine, while F-Secure and TotalAV use the Avira engine. The interfaces, settings, and services remain distinct, but having more brands in a comparison does not always mean having more underlying technologies.

In the projects we manage, we often see decisions based on a single score or an editorial comparison. A media recommendation can be helpful, but it is not equivalent to a laboratory test. For example, Tom’s Guide selected Avast as its free choice on September 22, 2026; this was an editorial opinion, not an independent certification.

Defining usage requirements, the IT environment, and responsibilities before deploying a security tool prevents most unpleasant surprises. An outside perspective can be especially helpful in distinguishing an antivirus need from a broader issue involving updates, backups, or access management.

FAQ about Windows PC security

Can two antivirus programs be installed on the same PC?

Two active primary antivirus programs are generally unnecessary. Microsoft states in 2026 that Microsoft Defender Antivirus automatically disables itself when another active antivirus product is installed on Windows.

Does Malwarebytes Free provide real-time protection?

Malwarebytes Free does not provide real-time protection, according to the official documentation updated on September 8, 2026. Malwarebytes Free allows quick and custom scans; real-time and web protection require a paid plan.

Which free antivirus should you choose for Windows 11?

Microsoft Defender Antivirus is the simplest choice since it is included with Windows 11 and scored 17.5/18 at AV-TEST in August 2026. Avast Free Antivirus and AVG AntiVirus Free each achieved 18/18 lors in the same evaluation.

Does an 18/18 rating guarantee total protection?

A score of 18/18 from AV-TEST means that the product achieved the maximum rating for protection, performance, and usability during a given testing period. No laboratory result guarantees complete protection against every malicious file, human error, or future vulnerability.