I can't login!

From: Howie (anonymous_at_discussions.microsoft.com)
Date: 10/31/03 

Date: Fri, 31 Oct 2003 05:19:33 -0800

Please help!!

    I am running Windows 2000 systems and I am locked out
of all of them. They are on a peer to peer network and
somehow something was changed and now none of the
passwords work!