Do you need antivirus for Windows Home Server?

Windows Home Server does not require an antivirus, but Microsoft recommends installing one to keep your server safe. This is especially true for servers connected to the Internet, which are more vulnerable to attack than desktop computers. Microsoft offers the Security Essentials antivirus suite to Windows users for free on its website and through Windows Update.

References:

Microsoft: Windows XP Consumer Security Software Providers

https://revision3.com/tekzilla/homeserver

Resources:

Microsoft: Security Essentials