This computer is running Terminal Server
Windows Small Business Server 2003 Setup cannot continue because Terminal Server (in Windows Server 2003) or Terminal Services in Application Server mode (in Windows 2000 Server) is not supported.
You must cancel Setup, remove Terminal Server or Terminal Services in Application Server mode, and then restart Setup.
To remove the Terminal Services component
Remove applications that were installed for Terminal Server because these applications were installed for use in a multisession environment and may not work correctly when Terminal Server is removed. Applications installed for multisession use are programs that were installed in the systemroot rather than the user’s home directory.
Click Start, click Run, and then type Control.
In Windows 2000 Server, double-click Add/Remove Programs.
In Windows Server 2003, click Add or Remove Programs.
Click Add/Remove Windows Components, and then under Components, clear the Terminal Services check box, and then click Next.
Windows Small Business Server 2003 does not include Terminal Server. However, you can remotely administer computers using Remote Desktop for Administration (in Windows 2000 Server, this was called Terminal Services in Remote Administration mode), which allows you to connect to the console or to create up to two new sessions from another computer. If you want to use Terminal Server to host applications centrally, you must install a second server.