To determine whether you have WSS 3.0 or MOSS 2007 installed, go to Windows Start -> Control Panel -> Add/Remove Programs.

• If you see 'Microsoft Office SharePoint Server 2007' in the list, then MOSS 2007 has been installed.
• If you see only 'Microsoft Windows SharePoint Services' in the list (and not 'Microsoft Office SharePoint Server 2007') then you only have WSS 3.0 installed.