This was the only thing that came up with your error message used as a search term at MS knowledgebase.
http://support.microsoft.com/default...roduct=win2000
Quote:
When you try to access the metabase by using Adsutil.vbs or Mdutil.exe, you may receive the following error message:
ErrNumber: -2146893792 (0x80090020)
Error Trying To ENUM the Object (GetObject Failed): w3svc
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It is for SP1 and SP2, but it might be an idea to turn of the crytography service etc.
Man, SP install issues can be a serious pain, eh?
http://aumha.org/win5/index.htm
Alright, I found it. This is just about the most incredible site I have ever seen for troubleshooting error messages. If you surf around, you will begin to see what I mean. I have given the URI for the main Win2K/XP page..
If I get some time, I will look in this site also for you. It is big, and inclusive.
Another option might be to try the update in safe-mode, but you would probably have to copy the CD to your hard drive first, as Windows will prob. not load CD drivers in safe mode (Maybe, I haven't done it for a while!)
I couldn't find anything specific on the site above, but one feature of it is the links it provides to Microsoft MVPers support and personal sites.
If you give us the error code, maybe I can help more!