EventLog 1073 when trying to Restart, shutdown or logoff

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Whenever I try to Restart, shutdown or logoff the machine refuses to react
and always leaves a system eventlog of 1073, which really doesn't tell me
much.

At the same time there is a Security log that seems to be releated:

Object Open:
Object Server: SC Manager
Object Type: SC_MANAGER OBJECT
Object Name: ServicesActive
Handle ID: -
Operation ID: {0,95604}
Process ID: 948
Image File Name: C:\WINDOWS\system32\services.exe
Primary User Name: SCOTT-C$
Primary Domain: NORSOFT
Primary Logon ID: (0x0,0x3E7)
Client User Name: NETWORK SERVICE
Client Domain: NT AUTHORITY
Client Logon ID: (0x0,0x3E4)
Accesses: DELETE
READ_CONTROL
WRITE_DAC
WRITE_OWNER
Connect to service controller
Create a new service
Enumerate services
Lock service database for exclusive access
Query service database lock state
Set last-known-good state of service database

Privileges: -
Restricted Sid Count: 0

This seems to indicate some type of security error. The account for SCOTT-C$
is the machine account in the domain.

This started after installing XP/SP3. After the initial SP3 reboot I needed
to rejoin the computer in the domain, then it asked to reactivate windows.

I have removed this computer from the domain and put it back. Doesn't seem
to have any effect. Everything seems to work OK other than this. I can force
a shutdown, but that isn't much better than hitting the power switch.

Anyway, I am at a loss, any ideas?

--
Scott
.