CLAMWIN

ClamWin is an antivirus program for Microsoft Windows operating systems that are free and open source.ClamWin actually is between the front free for antivirus engine ClamAV (Clam Anti Virus). ClamWim have some fiture that can be used to protect your computer from malicious viruses, Feature antivirus is not as much that is not open source, but it seems to be good enough ClamWin ability to slaughter a lot of viruses unsettling computer users.
Features ClamWin of them are as follows;

   1. Scheduling scanning.
   2. The existence of the virus database updates on a regular basis.
   3. The existence of a stand-alone virus scanner.
   4. The existence of the right-click menu that is integrated with Windows Expoler.
   5. The existence of the add ins for Microsoft Outlook.
   6. Portable version that can be used from a USB flash drive.