Sometimes when you have a bad software uninstall under windows, you can have services left behind. Since you have already uninstalled the software, how can you remove the service?
Like just about everything else, services are specified in the Windows registry.
To remove a service, go to the start menu, run, and type in regedit, then click ok
Dig down to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
You should see a list of all system services. Find the problem one and delete it.
As always, be sure to have a good backup of the registry first.