Backup and Restore the Registry in Windows
Before working in the Windows Registry, it’s always advisable to back it up first, so you have the choice of recovery, should something fail. This report shows the different methods to backup and restore the Windows Registry or its Hives.
Windows 10 includes a scheduled task that makes copies of the Windows Registry regularly whenever the system is idle. These backups are set in the C:\Windows\System32\config\RegBack that’s used in the System Restore operation.Backup and Restore Registry
Before starting, it’s wise to make a System Restore Point first.
You can save or backup your Registry using Regedit or the Registry Editor in Windows. Open Run box, type regedit and hit Enter to start the Registry Editor.
To back up the whole Registry, open Regedit, pick Computer and click it. Now select Export. Give the document a name and decide on a place where you want it stored.
The entire registry backup will be stored as a .reg file.
To backup a component of the Registry, browse to the Registry key or Hive which you want to. To back this up, click File > Export.
Registry Keys that are not backed up when you create a system restore point
The majority of the registry is backed up when you create a system restore point. I say most because the keys that are not contained are listed at:
Restore the Registry
To restore the registry from an exported hive, in the left pane of the Registry Editor, choose the desired Registry key, where you need restoration done.
Then click on File > Publish on the File menu. Navigate into the backed up file. Click OK to the confirmation prompt.
As an alternative, you may also simply double-click the backed up .reg file, to add it.
If you find this a bit difficult, you can always use free tools to get the same.