The service could not bind instance?

I have just gone onto my webserver and looked at the Event Viewer for the system Log and found the following error messages.
"The service could not bind instance 5. The data is the error code"
"The service could not bind instance 4. The data is the error code"

What do these mean?

Sounds like you have IIS configured for an IP address that doesn't exist or a port that's already in use. Check the setup of website #4 and #5 (default=1, Admin=2, etc.)

Are these websites still working?

Is there any mention of IIS Logging unable to create a specified directory? Try disabling/enabling logging.

Are you using host headers?

In the "extra data" at the bottom of the event there should be the winsock error in hex which may help you determine what it doesn't like.

See also:
http://support.microsoft.com/support.../q186/8/10.asp http://support.microsoft.com/support.../q218/4/41.asp http://support.microsoft.com/support.../Q185/8/75.asp