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I read and made a WinPE iso myself. It boots OK and I do something about diskpart, imagex and bcdboot, screen shot below:

enter image description here

But I have a question, how to safely shutdown/reboot the WinPE environment so that all buffered data is flushed to disk.

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up vote 7 down vote accepted

I got it. In winpe.chm provided by Windows AIK. It says:

wpeutil shutdown

wpeutil reboot

Tried it, true.

enter image description here

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