W2K sp4 rollup not reconized.

When I install Rollup 1 by using MS update, the event manager show a
successful install; but rerunning MS update insists that it needs to be
installed.

I have tried downloading the update manually and installing; same result.

I have tried clearing the download folder, temp. folder and IE cache; same
result.

1. Is there a fix for this problem?
2. Is there a list of files that the rollup update - so that I can
crosscheck to see if the proper files are installed?
3. That does Window update check to see if this rollup is installed?

Any help would be appreciated.