Find and display registry empty keys with Powershell

So you're looking for registry keys with no subkey and no property - except for the default value. Because both properties are provided when you use Get-ChildItem you just have to filter for them:

Get-ChildItem -Path 'REGISTRY::HKEY_LOCAL_MACHINE', 'REGISTRY::HKEY_CURRENT_USER' -Recurse -ErrorAction SilentlyContinue |
    Where-Object {
        -not $_.SubKeyCount -and
        -not $_.Property
    } | 
        Select-object -Property PSPath

It is still a bad idea to remove keys from the registry without the need.

Find and display registry empty keys with Powershell

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