Fixing Update entries in Registry

Archived from groups: microsoft.public.windowsnt.registry (More info?)

Once upon a time ago, a friend "hacked" my registry in order to
prevent unwanted MS Updates from being "offered." He created empty
folders in the registry with the update number. After that, WU no
longer displayed them as options.
I'd like to fix this istuation.
Looking at the Updates section of my Registry, I see a number of
keys which do not have values or data -- just the empty folders, and
no subfolders within them.
A list follows.

How do I know which keys to "remove" so that WU again offers me
the updates my computer needs?

<*((((><{
Fishy@Ocean.Net

===============================================================
Details of Keys starts here:

Keys in HKLM\Software\Microsoft\Updates\WIndows XP\SP2\ ...
all have the same Value, Name, Type, and Data:
Value 0
Name: <NO NAME>
Type: REG_SZ
Data:
KB821557
KB823559
KB823980
KB824146
Q323255
Q328310
Q329048
Q329115
Q329170
Q329390
Q329441
Q329834
Q331953
Q810565
Q810577
Q810833
Q811493
Q811630
Q814033
Q815021
Q817287
Q817606


<*((((><{
Fishy@Ocean.Net


<*((((><{
Fishy@Ocean.Net