Hi arif.kausar,
Installing the Symantec Endpoint Protection Manager onto Windows 7 is not recommended because Microsoft limits the amount if concurrent connections their workstation operating systems can handle to 10. This means that should you install the Symantec Endpoint Protection Manager to a Windows 7 machine, no more than 10 SEP clients could connect to the manager software at one time. This is a big limitation if you have more than ten or twenty machines.
I highly recommend installing the Symantec Endpoint Protection Manager to a server.
Regards,
James