"The situation with MOSS began early: people began noticing the
corporate intranet was returning a 404 “page not found”
error. The event logs revealed a variety of problems with missing
objects in the database SharePoint creates to support its searching
facilities. Googling these errors yielded several solutions which
all required being able to load the SharePoint Central
Administration facility. Yet, that is itself a SharePoint site and
it too was giving 404 errors."