Usually when you uninstall something associated service is removed with the software, but sometimes its not.

In order to remove service manually you need to:

• Click “Start” -> “Run…” -> type in “regedit”
• Find the registry entry
  HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services
• Find the service you need to remove and delete the entry. 
  Note: Check what files are used by the service as you might also want to remove them.
• Restart Windows.