Restarting the machine worked for me but not every time.
If you are really stuck on this then follow below steps
- Open Task Manager
- A window will open. Click on Details tab.
- Search for the process name you wanted to restart/stop.
- Select process, right click on it, select End task option.
- A confirmation dialog box will appear. Click on End process button.
- Now try to restart your service from Services.msc window.