When you join a Windows 2000 computer to a domain, your System event log may contain a Workstation service sourced Event 3113:
8/11/2000 6:04:01 AM Workstation Error None 3113 N/A XXXXXX Initialization failed because the requested service redirector could not be started.
The error is due to a changed naming context of the computer, but you haven't yet restarted to initialize the new context.
If you have only one of these error messages, you can safely ignore it. It should not reoccur after a restart.