Error Message during Windows Update

What could be preventing me from completing the windows update on my Win2K domain controller?? I’ve been getting the error message for about a month now. The event viewer displays the following:
Source: Windows Update V3 Category: None: Event ID 16389. The description for Event ID (16389) in Source (WindowsUpdateV3) cannot be found. The local computer may not have the necessary registry information or message dll files to display messages from a remote computer. The following is part of the event: V3_2j5265 Install security update, Feb. 12,2002 [1,10,101,0]2002-0409 11:44:32 (1) (FAIL)0 0x80004005 unspecified error.