Force Removing Windows Services
Some services are denied administrator to access on Windows such as McAfee services. I don’t know why administrator cannot manage every thing on Windows system. I think vrius maker and hacker already know this technology. How does administrator fight with them?
Delete the service via command line
C:\Users\chacha>sc delete service_name [SC] OpenService FAILED 5: Access is denied.
If access is denied, use the command regedit to edit registry table at:
Find the service and delete it. Then restart computer.
Source: Force-Removing Windows Services