ClamWin

ClamWin is an antivirus program designed to protect users of all Windows operating systems from harmful viruses and malware. With a scanning schedule, automatic updates and high rates of detection for viruses and spyware, ClamWin keeps users safe and secure from content that can infect and render their laptops or desktop computers useless. Easy to download and install, and featuring open source code, ClamWin protects over 600,000 users from around the world and keeps computers safe on a daily basis. All of these features are packed into one program and, best of all, it`s complete free.