To stop the Automatic Updates service, clear the contents of the DataStore
and Download folders, (if appropriate EventCache) and restart the
Automatic Updates service
1. Stop the Automatic Updates Service.
Click Start, Choose Run.
In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service. Select Properties.
Under Service status, click Stop.
Click OK
2. Now you'll need to clean out the Download folder for WU5 by deleting
the Contents of the DataStore and Download folders.
Click Start, Choose Run.
In the Run box, type %windir%\SoftwareDistribution.
Click OK.
Delete the contents of both the DataStore, (and perhaps the EventCache)
and Download folders.
You will lose your WUv5 History - not important
When you're ready:
Start the Automatic Updates Service
Click Start, Choose Run.
In the Run box, type services.msc.
Click OK.
Right-click the Automatic Updates service. Select Properties.
Under Service status, click Start.
Click OK.
If you have any doubts about deleting the contents of the above folders -
move the contents to another place on the HD as a backup.