Vista - Background Intelligent Transfer Service and MS Update

I have been troubleshooting an issue with the Background Intelligent Transfer
Service and I have been unable to resolve the problem. I have tried all of
the suggestions for renaming/deleting directories, registry changes, etc.
found in the knowledge base without any success. I cannot find a specific
article for the error code reported.

System Error log entries:

The Background Intelligent Transfer Service service entered the running
state. (Event ID 7036) 7/2/2007 12:13:16 PM

The Background Intelligent Transfer Service service entered the stopped
state. (Event ID 7036)

The BITS service failed to start. Error 2147942522 (Event ID 16392)

This issue appears to have started when I installed Norton Internet Security
2006. I have since uninstalled the product and the problem continues.

Is anyone aware of a fix or a Vista compatable download to reinstall BITs?
I really do not want to have to reinstall Vista Ultimate.