I have copied system registry file C:\Windows\system32\config\system from another windows machine (VM). And I want to open it and list out some keys from "...\ControlSet.." I open the Regedit and tried to open it but Regedit showing me the option of import which giving the warning that the registry keys ill be get replaced.
So I want to open it with PowerShell if not possible then want some tool to open the file and list out the required keys from it.
In your PowerShell script, you can use reg load/unload to automate what you described above.
$null = reg load HKU\CustomFolderName "c:\path\SYSTEM.DAT"
...
script code here
...
$null = reg unload HKU\CustomFolderName