What Is Malwarebytes and How Does It Work?
Malwarebytes is anti-malware software for Windows, macOS and mobile platforms, best known on the PC for finding infections that traditional antivirus overlooked. This article covers the Windows version only.
The short answer
It scans a Windows PC for malicious and unwanted software, quarantines what it finds, and — with a paid licence — blocks new threats in real time. It is published by Malwarebytes Inc.; this site is an independent guide, not the vendor.
How the detection works
Four layers run together: signature matching against known samples, heuristics that judge file structure, behavior monitoring of running processes, and a machine-learning anomaly component. Signature hits are the most certain; anomaly hits are the ones most worth reviewing before you delete anything permanently. The malware scanner page explains each layer in more detail.
What it removes
- Trojans, backdoors and information stealers
- Adware, toolbars and browser hijackers
- Spyware and keyloggers
- Ransomware, when the behavior layer catches it in time
- Potentially unwanted programs bundled with free software
Where it stops being useful
It cannot decrypt files ransomware has already locked, repair Windows components malware corrupted, or protect an account whose password has already leaked. It is one control among several — see our Windows PC security guide.
Frequently asked questions
Is Malwarebytes safe to install?
The application from the vendor is legitimate and widely used. The risk lies in repackaged installers from third-party portals, so verify the digital signature before running any download.
What does Malwarebytes do that antivirus does not?
It is more aggressive about adware and potentially unwanted programs, and its behavior layer targets ransomware and exploit techniques rather than known file fingerprints.
Malware-Bytes.net is an independent information resource about malware protection for Windows. We are not Malwarebytes, and this site is not the official Malwarebytes website or support channel. Malwarebytes is a trademark of Malwarebytes Inc.