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Windows Service Pack Installer update service

Recently I found the service "Windows Service Pack Installer update service" on my SBS 2003 (starttype: Autmoatic, not running). When starting manually it states "... will be stopped automatically ...." (see screenshot).

What is this service for and is the stopped status ok?
1 Solution
from the description in the binary:

Windows Service Pack Installer update service       Enables Windows update to finish up the post-reboot tasks. If you use Automatic Updates or Manual Windows Update, leave this on.

Default execution permission is Automatic.

Apparently it only execs when the system has to reboot after a windows update.  It doesn't need to be started all the time.
Just to add to this: this service should be temporary. It's installed as part of an SP update and should be removed once the machine is rebooted and the post-boot SP update actions are completed. It seems in some instances the service is not being removed.

MS suggested fix is to remove the spupdsvc key from HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/Services and reboot, but a simpler and neater fix is to run "sc delete spupdsvc" from a command prompt - no reboot needed.
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