Many customers used on Windows XP and Windows Server 2003 machines other names for the OS folder other than "Windows " (eg. WINNT) and now want to continue to use a different directory name for future OSes.

This was possible back then by using the setting TargetPath in the Unattend.txt.

Starting with Windows Vista / Windows Server 2008, this has changed and you can not change the Windows folder anymore. The hard-coded directory where  the operating system is now installed is "Windows ".

In the WAIK documentation the "TargetPath" entry is now addressed as “deprecated”:

Stefan Chivu

Platforms Core Team