ClamWin Free Antivirus is an open-source Windows front-end for the ClamAV® engine. Lightweight and portable, it delivers high detection rates for viruses, trojans and spyware without the bloat of suite-style “system cleaners”. Think of it as a specialist on-demand scanner: keep it on a USB stick and run a second-opinion sweep whenever you suspect trouble.
Key functions
- High detection rate with hourly signature updates; first launch prompts to grab the latest definitions.
- Right-click Explorer integration—scan single files, folders or entire drives on demand.
- Memory and full-disk scanning; scheduled tasks can be created with Windows Task Scheduler.
- Completely free, no ads, no real-time shield (on-demand only).
Installation note
By default the installer offers a toolbar. Untick that option if you don’t need it, or choose “Custom” and leave only the two core components checked for a minimal virus-removal tool.