Download ClamWin Antivirus
ClamWin Antivirus works together with Microsoft Office Outlook and Windows Explorer to protect your computer from any incoming e mails or information that can damage your computer and corrupt your registries while you surf in the Internet.
This antivirus is completely free and highly recommended by professionals. It gets updated constantly and almost every day, for you to be protected with the most complete virus database. It has a user friendly interface.
It will scan your computer in seconds and without consuming your system resources. It works in the background where you won't even notice and it will only alert you when it detects suspicious behavior in your computer.