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I have created a Vista disk image with ImageX, largely following the instructions at When I apply the image to a clean, active partition on identical hardware, I get the message "BOOTMGR is missing."

I can get the computers to boot by using the repair tool on the Vista media. If I click "Repair your computer" after booting to the OS media, Windows searches for installations, presumably finds one, and says "Windows found problems with your computer's startup options." I then still get the "BOOTMGR is missing" error - but if I run the "Repair your computer" tool again, I get a dialog that allows me to choose "Startup repair" from a bunch of options. After this, the computer will boot.

I want to understand why this is happening - and how I can avoid it, either by adding script actions after the ImageX command or otherwise.

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up vote 1 down vote accepted

I've had to deal with this building custom BartPE-based Windows Vista imager DVDs.

After you run ImageX, run the following commands (assuming your Vista boot volume is assigned to drive letter "C:" when you run these):

bootsect /NT60 C:
bcdedit /set {default} device partition=c:
bcdedit /set {default} osdevice partition=c:
bcdedit /set {bootmgr} device partition=c:

Off the top of my head, I believe I got "bootsect" from the Windows Automated Installation Kit. "bcdedit" is already part of Vista.

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Giving this a shot now! Thanks Evan! – Doug Chase Aug 7 '09 at 19:51

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