In tip 7632, I described how to configure Automatic Updates using group policy.
In a non-Active Directory environment, you can configure Automatic Updates using the registry. The key path is:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\AU.
NOTE: You must manually add any missing sub-key.
The Value Names that correspond to the group policy settings are:
Value Name Data Type D e s c r i p t i o n
NoAutoUpdate REG_DWORD 0, the default, Automatic Updates is enabled.
1, Automatic Updates is disabled.
AUOptions REG_DWORD 2, Notify for download and notify for install.
3, the default, Auto download and notify for install.
4, Auto download and schedule the install.
ScheduledInstallDay REG_DWORD 0, Every day.
n, where n is a number from 1 (Sunday) through 7 (Saturday).
ScheduledInstallTime REG_DWORD n, where n is the time of day in 24-hour format, 0-23.
UseWUServer REG_DWORD 1 uses a server running SUS (Software Update Services).
RescheduleWaitTime REG_DWORD m, the time in minutes, 1-60, to wait, after startup,
for a missed update.
NoAutoRebootWithLoggedOnUsers REG_DWORD 1 does NOT automatically restart the computer if a
SUS SP1 client is logged on.
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