WMI problems (error 4200 among other things)

All WMI I try fail with "can't create objects" (but run perfectly on other
servers). I've tried a number of things (and am now out of ideas) and
everything is reported below.

I also get this error from WMI when trying to install the latest SQL 2005
beta (the beta newsgroups suggestions did not help so I went here):


The link doesn't provide any help at all about the
problem, its source, or
anything that may help identify and solve it.
So I searched around and found
lots of 4200 errors in the C:\WINDOWS\system32
\WBEM\Logs\wmiprov.log



So I went checked WMI properties in Computer Management/Services and
Application/WMI Control and the General tab showed:



The event log also has this error:

which I tracked down to "Microsoft WMI Provider Subsystem Host" in the
registry.

I checked RPC (seems to work), and I also (suggestion from the beta
newsgroup) re-registered WMI:

> Mofcomp.exe %windir%\system32\wbem\cimwin32.mof
> Regsvr32 wbemupgd.dll
> regsvr32 wbemsvc.dll

It did not work either and "Regsvr32 wbemupgd.dll" seemed to take forever
(3-4 minutes). WMI services are started of course. I also tried adding
NETWORK SERVICE and LOCAL SERVICE to "Impersonate a client after
authentication" in the local policies.

I don't know what to try next:-(
It's a Windows 2003 Server with all the latest patches. 2 cpu, 2gigs of RAM,
lots of disk space.

Anybody have a clue?

Eric