Free Antivirus Software: What Is Genuinely Free
Search results blur three very different things together: permanently free antivirus, time-limited free trials, and free on-demand scanners that provide no ongoing protection. Knowing which you are downloading is the whole game.
This page lists the genuinely free options for Windows, explains what each one omits, and points to free virus removal and scanning tools that complement them.
Products covered on this page
Bitdefender Free
A permanently free Windows antivirus from a top-tier detection vendor.
free · Windows
Permanently free antivirus
Microsoft Defender (built into Windows), Bitdefender Antivirus Free Edition, Avast Free Antivirus, AVG AntiVirus Free, Avira Free Security and Panda Dome Free. All provide resident real-time protection at no cost and no expiry.
Free scanners that are not antivirus
The free version of Malwarebytes is an on-demand scanner and remover. It is excellent for free virus removal and free malware removal, but it does not block threats in real time. Run it alongside a resident engine, not instead of one.
What free tiers hold back
Firewalls, ransomware remediation, uncapped VPN traffic, password managers, identity monitoring, parental controls and support. Those are features, not detection — which is why free antivirus protection is a reasonable choice rather than a compromise.
Frequently asked questions
- Is free antivirus software safe?
- Yes, when downloaded from the vendor's own site. Most horror stories are about the download source, not the software.
- What is the best free anti virus?
- Microsoft Defender for integration and silence, Bitdefender Free Edition for a third-party engine, with Malwarebytes free for on-demand cleaning.
- Is a free trial the same as free antivirus?
- No. A free trial is paid software with a timer and should never be described as free.