You should be able to kill it via the Task Manager.
Right-click on taskbar -> Start Task Manager Go to Process tab
If you can find the service under the Processes tab:
Right click and select "End Process"
If you don't see it under Processes (or don't know which is the process for the service you want to kill),
While on the Processes tab
Check "Show processes from all users" in the lower left
Then "View" menu and choose "Select Columns"
Check "PID" and hit OK
Go to the services tab to find the PID of the service you want to kill
Go back to Processes tab and Right-click -> End Processstrong text
Copied the answer from the https://superuser.com/questions/489949/force-windows-7-service-to-stop
and it worked for me.