"NLB Failed to Start" Error Message on Windows 2000/2003 If NLB Is Not Installed:

To prevent these error messages from occurring, remove the following registry subkeys (if they exist) after you back up the registry: 

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Eventlog\System\WLBS

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WLBS