How to choose an antivirus in 2026
An antivirus should protect you without turning your computer into a snail. Here are the objective criteria for choosing, and why free can be enough in some cases but not others.
The detection rate
This is the heart of the matter. Rely on the results of leading independent labs like AV-TEST and AV-Comparatives, which test protection against real threats every month. An antivirus should show high, consistent scores over time, not just a one-off good grade.
Impact on performance
Good protection should not bog down your machine. The same labs measure the slowdown at startup, when opening applications and during a scan. On an older computer, this criterion becomes as important as detection itself.
False positives
An overzealous antivirus that blocks legitimate software is annoying and may push you to disable protection. Check the number of false positives reported by independent tests: a good product balances vigilance and peace of mind.
Features and price
Beyond the antivirus, suites add a firewall, anti-phishing protection, a VPN or a password manager. These options are worth it if you actually use them. Compare the real scope of each plan and the renewal price, often higher than the first year.
Free or paid, and then what
For basic, careful use, a reputable free antivirus combined with good habits can be enough. For sensitive data, a family or a small business, a paid suite provides more complete protection. Our quiz helps you decide based on your devices and budget.
Frequently asked questions
Is Windows Defender enough?
It now offers decent baseline protection for careful use. For advanced protection, anti-ransomware modules, a VPN or parental controls, a dedicated suite remains superior.
Does an antivirus slow down the PC?
Good products have minimal day-to-day impact. Slowdown is mainly felt during full scans, which can be scheduled at night.
Do I need an antivirus on Mac?
macOS is fairly well protected, but not immune, especially against phishing and unwanted software. A lightweight antivirus adds a useful layer of security depending on your usage.
Take action
Find the tool made for you in one minute, or explore our full comparison.