If you are looking for a free Antivirus for Windows then you have to try ClamWin Free Antivirus and get free virus scanning and free virus definition updates. It has a small footprint, and doesn’t take up much system resources. It will scan your entire hard disk at once for viruses and spyware, or can scan individual files and folders. It also includes a Microsoft Outlook add-in to remove virus-infected attachments automatically from your email. There is one drawback to the program, though: It doesn’t include real-time virus protection.
Features:
* High detection rates for viruses and spyware;
* Scanning Scheduler;
* Automatic downloads of regularly updated Virus Database.
* Standalone virus scanner and right-click menu integration to Microsoft Windows Explorer;
* Addin to Microsoft Outlook to remove virus-infected attachments automatically.
ClamWin is nice but it lacks one of the most important feature an AV should have, that is real time scanning.