missing key/value in registry of w2k server - hot to track it?

From: kono (kono_at_discussions.microsoft.com)
Date: 06/13/05

Date: Sun, 12 Jun 2005 19:19:03 -0700

wi there,
Recently I have a problem that the key included the value in registry had
been deleted / missing but I can not find why or by who? My question is
perharps there is a way to zoom in why it could be happened and how to track
the causing of missing key/value in registry. Is there any tools to help it
out? Thanks for your help.....