When you perform an unattended installation of Windows Vista, you may find that the “[servicing]” section of the automatically detected unattended-answer file (Autounattend.xml) is not processed.

The “[servicing]” section contains instructions to install language packs, hotfixes, or other packages. The unattended-answer file is automatically detected by Windows Setup because this file is located in one of several valid search locations for unattended-answer files. Because of this problem, the installation of language packs, hotfixes, or other packages fails silently.

This problem does not occur if the Autounattend.xml answer file is explicitly specified by using the /unattend switch.