We've got you covered
It's security, made easy
System Requirements
Windows Server 2008 R2 including Core 500 MB 256 MB
Windows Server 2008 Core
Windows Server 2008
Windows Server 2003 R2
Windows Server 2003
Windows 2000 SP3
Windows SBS 2011
Windows SBS 2008
Windows SBS 2003 SP1+
Windows SBS 2000 SP4+
Windows 7 including XP Mode
Windows Vista
Windows XP Home SP1a+
Windows XP Pro SP1a+
Windows 2000 Pro SP3+
Pros
Sophos can detect and disable malware before it has a chance to infect your computer system.
Cons
If you require a firewall, you will need different Sophos products.
Sophos Anti-Virus Small Business Edition is a serious contender.