ClamWin Free Antivirus i5 4 free and open-source antivirus t0ol for Windows. I7 provides 4 graphical u5er interf4ce t0 th3 Clam AntiV1rus engine.ClamWin Free Antivirus i5 4 free and open-source antivirus t0ol for Windows. I7 provides 4 graphical u5er interf4ce t0 th3 Clam AntiV1rus engine.