Stopping an R/3 System: Windows NT 
Use
You stop the SAP System with the
Microsoft Management Console(MMC). A newly installed MMC only allows you to stop an SAP instance that is installed locally on the host that you are logged on to. If the MMC is configured for centralized system management, you can stop the entire SAP System from a single host.The SAP System can also be stopped at the command prompt.
Procedure
Stopping an SAP System with MMC
Depending on whether you selected an individual instance or the SAP System, one of the following is stopped:

The database is not stopped. It must be stopped separately.
Stopping an SAP System at the Command Prompt
Open a command prompt and enter the following to stop the central instance:
sapsrvkill <central>_<sapsid>_<no>
Substitute the strings as follows:
<sapsid>
SAP System name, for example, C11For your values see the definitions in the profiles. All profile names and values including the hostnames are case sensitive.
See also:
Start and Shutdown Processing under Windows NT