I had a client pc that was not updating with Windows Updates in our WSUS server. Looking through the logs I was receiving the error “FATAL: WUAutoUpdateAtShutdown failed, hr=80240FFF”. On looking through the services, the automatic updates service was missing. Running regsvr32 wuaueng.dll added the service back in but I was unable to start the service with the message “Error 1083: The executable program that this service is configured to run does not implement the service””
I also found that I was unable to start the BITS service. Googling on that came up with the Helpsvc fix application that fixes errors with the help and support service. Downloading and running this application, although seemingly unrelated to my problem fixed both BITS and Windows Updates on the machine. Thanks to the newsgroup posting by Greg Kirkpatrick