The Automatic Updates Service starts and then stops automatically

You see Automatic Update Services stops automatically even though the services is set to automatic start up.

This reason for such behavior is, If you change the properties of� the Automatic Updates service (via Group Policy - Computer Configuration, Windows Settings, Security Settings, System Services) to set it as Disabled or edited the Access Control,�ACL on�Automatic Update Client (WUAUSERV)�service.

Since, the ACL (permissions) on the Automatic Update Service (WUAUSERV) is changed, we have to reset the security settings on the Automatic Updates Service (WUAUSERV)�& BITS Service to the default settings;
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To reset the ACL on the BITS & WUAUSERV services to default, run the following command (in one line) as Domain Administrator or Local System account on the machine. (Only these accounts can modify the ACL on these services on your machine)
�
1.
sc sdset bits
"D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)"
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2.
sc sdset wuauserv��
"D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)"
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Note:�Both the commands�needs to be on one line from a command prompt (disable word wrap). See the batch file which can automate the process.
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To automatically run the commands, save the following code in the Notepad & use this simple SetServiceObjectSecurity.cmd batch file & double click to run
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@echo off
Echo This batch file will Set Service Object Security for WUAUSERV & BITS.
Echo Please wait...
@echo on
sc sdset bits "D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)" >>C:\SetServiceObjectSecurity.log
sc sdset wuauserv "D:(A;;CCLCSWRPWPDTLOCRRC;;;SY)(A;;CCDCLCSWRPWPDTLOCRSDRCWDWO;;;BA)(A;;CCLCSWLOCRRC;;;AU)(A;;CCLCSWRPWPDTLOCRRC;;;PU)" >>C:\SetServiceObjectSecurity.log
@echo off
Echo Open C:\SetServiceObjectSecurity.log for SUCCESS entry.
Echo Open the Services applet from control panel to see if the services are started.
Echo For any errors; report on http://groups.msn.com/NTarabia
@echo off
Pause
=========================================================================================

Procedure to manually Re-Install Automatic Update Client
http://support.microsoft.com/kb/555331

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