I see you can remove items by running:
Remove-Item -Path hkcu:\CurrentVersion
But I tried
Remove-Item -Path 'Registry::HKEY_CURRENT_USER\Software\Testing\(Default)'
But that did not work. I also tried
Remove-Item -Path 'Registry::HKEY_CURRENT_USER\Software\Testing\' -name '(Default)'
Which also did not work. Any ideas how I can remove a (Default) registry key via powershell?
Have you try to delete it from the registry .msc console?
I think isn’t possible to delete the default value for a key.