Unfortunately when you boot an unattended Windows DVD / Media (which contains autounattend.xml), you are directly taken to the installation routine.There is no option to launch the recovery environment.So if you want to repair a computer using an unattended Windows DVD, just follow the steps given below.
Boot from unattended Windows DVD or Media
You are directly taken to installation routine (probably the disk management step)
Windows 7 repair option
in Microsoft Windows 7
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Thanks for this, I was looking for this info