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.
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.