by jimmy » 19.07.2013, 06:42
I found a somewhat simpler solution that also works. Since the UpdateInstaller.exe uses Autologon.exe from Sysinternals to perform the auto logon, I searched for problems with Autologon.exe. I found one reference where the poster set the AutoLogonChecked key default value under Winlogon to 1. Normally it's default value is not set. (HKLM\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\AutoLogonChecked). After setting this key Autologon.exe started to work by itself. Prior to setting this key Autologon.exe did not work at all.
Once the system reboots if you check the registry again you will see that AutoLogonChecked is back to being not set again, but that doesn't seem to matter. Autologon still works. It appears as if AutoLogonChecked must be set to 1 at least once to perform some sort of initialization ( just guessing here ).
So to make this work with the UpdateInstaller.exe I simply ran regedit before running the UpdateInstaller, and set AutoLogonChecked default value to 1, and then made sure that AutoAdminLogon under Winlogon was set to 1 and I deleted the AutoLogonCount key if it was present under Winlogon. This is a bit simpler and better because you don't have to mess around with the WOUTempAdmin password.
Just for reference I am installing Windows 7 x86 from the original DVD without SP1 on the DVD.
Hope this helps.