Best Antivirus for Windows PC in 2026

How to Choose Antivirus for a Windows PC

Why Windows still needs attention

Windows runs on most desktop and laptop computers, which makes it the main target for malware. Ransomware, infostealers and fake software installers mostly aim at Windows users. Windows 11 helps with stronger defaults such as Secure Boot and TPM requirements, but a good antivirus still adds important layers.

The two numbers that matter most

Protection scores from independent labs come first. AV-TEST and AV-Comparatives test products against real threats and widespread malware, and they also measure false positives. Look at results over several rounds, not a single award.

System impact comes second. A product that slows boot, file copies or games will frustrate you, and you may be tempted to switch it off. Both labs publish performance results, which are worth checking if your PC is older.

How our top picks compare

Bitdefender offers the best balance of detection and performance on Windows. Its free tier is a strong option, and Total Security adds ransomware recovery, a firewall and a vulnerability scanner.

ESET has the lightest footprint we have measured, which makes it ideal for gaming and older PCs. It also gives experienced users detailed control over scans and exclusions.

Kaspersky combines excellent detection with very low resource use. Germany's BSI warned against it in 2022, so check workplace rules if you use your PC for work.

Microsoft Defender is free, already installed and close to paid suites on detection. For careful users it is a legitimate baseline, though web protection works best in Edge.

Malwarebytes is the best second-opinion scanner. Run the free version alongside Defender for an extra check, or pay for Premium as a light real-time layer.

Gaming and performance

Gamers should look for an automatic game mode that pauses notifications and scheduled scans when a full-screen app is running. Bitdefender and ESET both handle this well. Exclude your game library folders from real-time scanning only if you trust the source, since modded files can carry malware.

Schedule full scans for times when you are away. Quick scans and real-time protection cover daily use, so a weekly or monthly full scan is usually enough.

Be careful with game cheats, cracked launchers and free key generators. They are one of the most common ways infostealers reach gaming PCs, and many ask you to disable your antivirus first. If a download asks you to switch protection off, treat that as a clear warning sign. Store accounts on Steam, Epic and similar platforms should also use two-factor authentication.

Defender or a paid suite?

Defender is enough if you keep Windows updated, use a password manager and avoid pirated software. A paid suite makes sense if you want a firewall with clearer controls, ransomware recovery, a VPN, parental controls or support when something goes wrong.

You do not need both running at once. Installing a third-party antivirus switches off Defender's real-time scanning automatically, and uninstalling it switches Defender back on.

Windows settings worth checking

Open Windows Security and turn on Controlled Folder Access for ransomware protection. Make sure reputation-based protection is enabled to block potentially unwanted apps. Keep automatic updates on for Windows, drivers and your browser.

If you still use Windows 10, upgrading matters more than which antivirus you pick, since the operating system no longer receives free security updates for most users. Check whether your PC meets the Windows 11 requirements in the PC Health Check app before you decide to replace it.

Our recommendation

Choose Bitdefender for the best overall protection with little slowdown, or ESET if you game or use an older PC. Defender is a fine free choice for careful users, and Malwarebytes is worth keeping as a second opinion. Kaspersky is a strong performer if its origin does not concern you.