A sharepoint service as defined by Sharepoint 2010 is not your typical “run-of-mill” service.  You can’t simply go to the Windows Service snap-in (commonly referred by sysops as services.msc), and hit Stop or Restart.

You’ll need to fire up the Sharepoint 2010 Management Shell.  You might need to logged into the box as a Farm Administrator.  Run the command:

Get-SPServiceInstance.   Locate the GUID, and then run.

Stop-SPServiceInstance <GUID>

Select ‘Y’ to stop it.  You should be able to refresh the Central Administration > Services on Server dashboard and see the respective service is stopped.