Consider the following scenario:
You install a Korean version of Windows 7 on a touch-based system that does not have a physical keyboard attached.
You use Sysprep.exe to reseal the image.
You boot the computer and start the OOBE process.
At the beginning of OOBE, you attempt to use the Windows on screen keyboard to press CTRL+SHIFT+F3, which should reboot Windows back into Sysprep audit mode.
In this scenario, nothing happens when you try to use the keyboard shortcut to reboot Windows back into audit mode.
To resolve this issue and reboot Windows into audit mode, you will need to attach a USB keyboard and then execute the CTRL+SHIFT+F3 keyboard shortcut.