At many occasions, Windows professionals come across a number of situations when service or Driver references in the registry are left back in the registry, and Windows tries to load them at every boot and fails. The knowledge base is all about the methods to remove unwanted services from Windows Vista, XP and Windows 7.
Using the SC.EXE command:
SC DELETE < service_name >
Using the Registry Editor:
HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services
You may also use Autoruns manage Windows startup, services, drivers, Winsock providers, Internet Explorer add-ons and Shell extensions.