Open your registry and find or create the following key:
HKEY_LOCAL_MACHINE\Software\Policies\Microsoft\Windows\WindowsUpdate\AU
Create the required DWORD values from the list below:
Value: NoAutoUpdate
0 - Enable Automatic Updates (Default)
1 - Disable Automatic Updates
Value: AUOptions
2 - Notify for download and notify for install
3 - Auto download and notify for install
4 - Auto download and schedule the install
Value: ScheduledInstallDay
0 - Install every day
1 to 7 - Install on specific day of the week from Sunday (1) to Saturday (7).
Value: ScheduledInstallTime
0 to 23 - Install time of day in 24-hour format
Restart Windows for the changes to take effect.
Or did you have anything else on your mind?