Unix Server Tech Knowledge Base

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====== Installation Errors ======

===== Computer Restarted unexpectedly =====

I was doing an install of Windows 7 Pro as a Xen hvm and ran into this problem. It took a while to figure out, and I finally found this is not an Xen issue but a well known issue with Windows for Windows 7 and 10.

The installation goes fine, then the machine reboots and you get the message:

<wrap hi>
The Computer Restarted unexpectedly or encountered an unexpected error.  Windows installation cannot proceed.  To install Windows, click OK to restart the computer and then restart the installation.
</wrap>



Pressing the return key reboots the system, then it ends up back at the same place. To repair **do not** press the "Ok" button. Instead:
  - Press Shift+F10, which opens a command prompt
  - Open the registry editor by typing //regedit//
  - Find the key //HKLocal machine/SYSTEM/SETUP/STATUS/ChildCompletion//
  - Select //setup.exe on// the right pane and edit it, changing the value from //1// to //3//
  - Close regedit and the command prompt
  - restart the system (with the "Ok" button)

See [https://answers.microsoft.com/en-us/windows/forum/all/error-message-the-computer-restarted-unexpectedly/b770f14d-e345-e011-90b6-1cc1de79d2e2] for full details (mainly people saying thank you to the solution).