Windows 10: restore registry from backup under USB command prompt

I made an incorrect registry change and the system fails to boot and will not go into recovery mode. I have booted from a USB and, using the command prompt, checked RegBack and found it empty. I did make a manual backup of the registry before I made the change. Is it possible to restore this backup from the recovery USB drive created on another computer?

:)

 

How to backup and restore registry using only win10 iso command prompt

In a link it suggested several registry troubleshooting steps for a Windows with black screen.

For Windows 10 1909 how do you backup and restore one registry change using a windows 10 iso command prompt?

If more than one registry entry is modified how do you backup and restore a second change?

In addition to modifying one or two commands how do you backup and restore the whole registry when the only access is via a windows 10 iso command prompt?

 

How to backup and restore registry using only win10 iso command prompt

The only access post windows upgrade is Windows RE using a windows 10 iso.

Registry steps may be needed that require deletion of the registry entries.

Aren't there two methods for backup: a single change and the whole registry?
I've never done either and need specific steps using Windows RE command prompt.
Also I've never restored a registry backup.
How do you restore a single backup using Windows RE command prompt?
And how do you restore the whole backup?

Again I've never done any significant changes in the registry and need specific steps using only the Windows 10 iso.

 

How to backup and restore registry using only win10 iso command prompt

I just explained how to back up the hives from command prompt in winre. Do that before making any changes to the originals.
You can restore them in the same way - copy and paste using notepad save as dialog.


HIves can be edited by opening regedit. At winre cmd prompt type: regedit

Click on HKEY_LOCAL_MACHINE (HKLM) to highlight it, then click Load hive - navigate to the hive on your windows partition and pick it up. Give it any name you like. For example C_soft

Then you will see C_soft under HKLM and you make any changes/export exactly the same as you do in windows..






If you export anything, the path in the exported reg file will show C_soft, obviously.

example:

Code:

Then make sure the loaded C_soft hive is highlighted and click Unload Hive.