Hi,

I have the same problem.  I try with the real administrator but i have de
same problem.

The answers people are giving just sound so generic and
uneducated. I am having the exact same problem and it is
not a permissions issue. There is something going on with
Microsoft's update engine and they will probably have it
resolved within the next few days.

10E291E444A4@microsoft.com>...

Another frequent cause of these symptoms are the permissions on "Manage
auditing and security log" in group policy.  When Windows Update runs it
adds entries into the System log (typically event 18 or 19) - if the
account under which the updates are run does not have rights in the "Manage
auditing and security log" group policy, that entry cannot be created and
the update attempt will fail.

To verify/correct this problem, please follow these easy steps.

1. Click Start->Run, type "gpedit.msc" (without quotation marks) in the
open box and click OK.

2. Navigate to the following folder by expanding the "+" beside the tree in
the left pane: Computer Configuration\Windows Settings\Security Settings\
Local Policies\User Rights Assignment

3. Highlight "User Rights Assignment" in the left pane and double click
"Manage auditing and security log" in the right pane.

4. If the administrator group is not listed there, please click "Add user
or group" and type in "administrator".

5. Click Ok and then click Apply.

6. Repeat the above steps 3-5 and add the administrator group to "Back up
Files and directories."

Please Note:  You will need to update group policy on the
server/workstation in question, and that the current user will need to
logoff and back on before a new security token will be generated based upon
the new permissions.