Resolution:
Before deleting any project or making changes to the deployment, you should first stop any deployed components and undeploy. If you failed to undeploy before you deleted the projects or to uninstall TIBCO BusinessWorks, you might be left with orphaned NT services. You can use regedit to remove the NT registry key(s) found under:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
The names of the service are of the form &ltproject name>.&ltengine name>
Once the entries are removed, you will need to reboot the machine.