To kill windows service forcefully:
C:\WINDOWS\system32>sc queryex "Bonjour Service" SERVICE_NAME: Bonjour Service TYPE : 10 WIN32_OWN_PROCESS STATE : 4 RUNNING (STOPPABLE, NOT_PAUSABLE, ACCEPTS_SHUTDOWN) WIN32_EXIT_CODE : 0 (0x0) SERVICE_EXIT_CODE : 0 (0x0) CHECKPOINT : 0x0 WAIT_HINT : 0x0 PID : 2688 FLAGS : C:\WINDOWS\system32>taskkill /F /PID 2688