Question : why we need  some services on Windows 2003 DC?

We have on IT inspection. Belong their reports we should closed some services on Windows2003 DC and WindowsXP PC's(if available). I'm not sure about if I closed the services it causes any problem or not. If you know which they used for pleased clarify me.
thank you.
the services are:
Application Experience Lookup Service
Application Management
ASP.NET State Service
Background Intelligent Transfer Service
Computer Browser
Error Reporting Service
FTP Publishing Service
IIS Admin Service
Portable Media Serial Number Service
Remote Shell Service
Removable Storage
Shell Hardware Detection
Upload Manager
User Name Mapping

Answer : why we need  some services on Windows 2003 DC?

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