how to fix failed mpm--register-components in miktex update 2.9.4352

Hi:

I updated MikTeX to miktex 2.9.4352 (20111201) on Windows 7-64 with Update
(Admin). Normally this goes smoothly and routinely (never had problems
before) but this time, I forgot to temporarily disable the firewall (Output
Firewall Pro 7.5) and fumbled on the keyboard in giving manual permissions
to the update manager. The results: all the packages seemed to be updated
but the last step regarding mpm failed (see the attached log file)

mpm --register-components --verbose --admin:
mpm.exe: Windows API error 5: Access is denied.
mpm.exe: Data: regsvr32.exe
configuring fontconfig\config\fonts.conf
registering C:\Program Files (x86)\MiKTeX 2.9\miktex/bin\MiKTeX209-core.dll
Error: The operation failed for some reason.

I tried to rerun the update manager (admin) but it said that no new
packages found so it won't run again.
My questions are:

Is there a way to undo or rerun the update (admin) so I can get the mpm
thing fixed?

Or it doesn't matter much and I can just leave the MikTeX system as is?

Or should I run setup-2.9.4321.exe and re-install the whole MikTeX system
(reluctantly)?

Or should I get the newest update miktex 2.9.4360 (20111209) and hope that
everything will fix by itself?

Advice is much appreciated.

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