Spector 360 components can be installed on recent Windows Desktop operating systems including XP and Vista (the client computers being monitored) as well as on Windows Server 2003 and 2008. As the management and backend components can be installed in a distributed manner so that they integrate in your infrastructure it is recommended your check the vendor’s detailed prerequisites.
On the other hand, as was done during the evaluation of Spector 360, you can install Primary Server, Control Center, WebFilter Server and Data Vault Server onto one Windows Server computer for example. If you have less than 1000 clients Spector provides Microsoft SQL Server 2005 Express for you, otherwise a Microsoft SQL Server 2005 instance has to be used.