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How to make OFFLINE changes on the registry of your Windows server?
With WinPE you can load a part of the register of your server (or called a hive) for modification.
Once the change has been made​​, simply unload the hive to save the change.
Reboot your machine on its hard drive and the modification will be applied.

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NetBoot? to Rescue-winpe and use the Registry Editor to Winpe



1) Install a hive



Start the registry editor: start -> run -> regedit



Select the registry key, or mount the main hive (ex: HKEY_LOCAL_MACHINE)



Then click on File -> "Load hive ..."



Navigate on the partition of the server system to: c:\windows\system32\config
and select the desired hive (Default, SAM, etc. ..)



Assign a name for the hive assembly



The Hive is then mounted in the main registry key under the name specified.
Navigate to the mount point, you can now change this part of the register according to your needs.

2) Remove a hive

Once made ​​your changes, you must unmount the hive to validate the changes.



Select your mount point



Then click on File -> "Unload Hive ..."

Netboot is now confirmed and on the server's hard drive.