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Major screw-up here and I need to find out how much trouble I am in.

I have an AD machine that is running Server 2008 R2, hyperv, DHCP and DNS. On the hyperv machine, I have a backup AD instance running along with a handfull of other server 2008 instances.

Sysprep was run on the hyperv machine instead of one of the instances.

I am attempting to bring the machine back up so I can try a system restore.

When I boot the hyperv machine, I get an error that says “Windows could not complete the installation. To install windows on this computer , restart the installation” This message occurs in safe mode, AD restore mode and in last known configuration mode.

enter image description here

How can I get my OS to boot at this point? Do I need to reinstall 2008 R2 from scratch?

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Do you have a recent system state backup? – Vick Vega Feb 1 '12 at 0:08
And this, folks, is why you have and test backups – TylerShads Feb 1 '12 at 0:10
I have a recent backup but I need to get to the VHDs that run Acronis. – rboarman Feb 1 '12 at 0:14
up vote 4 down vote accepted

Your best bet is to connect the volume that the VM is on to another machine and pull it out. Then, you can transfer it to another Hyper-V server to get your AD up and running.

While the copy is happening, update your resume.

Then, you may have to reinstall/restore the physical host.

share|improve this answer
Resume updated. Luckily, the servers are used for my home development network. The vhds are on a raid 5 volume on the server. Sounds like I should do a clean install of 2008 R2 and copy off the AD backup instance. – rboarman Feb 1 '12 at 0:13

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