Here are some decent sources to get an idea of what is on the market and get a second opinion, it's not listed in any particular order:

Free Anti virus, spyware, malware software:

• AVG Free Edition
• Avira AntiVir Personal
• Avast Home Edition

Paid Anti virus, spyware, malware software:

• ESET - NOD32
• Kaspersky
• Symantic / Norton
• AVG plus firewall

Additional Review Resources 

• CNET.com
• List of Antivirus software from Wikipedia