Server 2012 Core.
I can manually check for Windows Updates with sconfig option 6. I can set Windows Updates to automatic with sconfig option 5. Great.
What if I want to change that to 4 AM? What if I want to change it to only check once a week?
I sniffed around in
HKLM:\Software\Microsoft\Windows\CurrentVersion\WindowsUpdate\ but didn't see anything that looked like it let me fine tune the schedule like I want.