ClamWin Free Antivirus

ClamWin Free Antivirus was a free and open-source antivirus tool for Windows. It provides a graphical user interface to the Clam AntiVirus engine. The software has not been updated since 2021.

WWW Official Site

Features

Scanning scheduler.
Automatic virus database updates on a regular basis.
Standalone virus-scanner.
Context menu integration for Windows Explorer.
Add-in for Microsoft Outlook.
A portable version that can be used from a USB flash drive.

There are Firefox extensions that allow the users to process downloaded files with ClamWin.

No real-time scanning

ClamWin Free Antivirus scans on demand; it does not automatically scan files as they are read and written.
The non-affiliated projects Clam Sentinel and Winpooch are add-ons that provide a real-time scanning capability to ClamWin.