mmc – Windows cannot access the specified device, path, or file.

If you get the following error on a Windows Server (possibly desktop client), you can use the local group policy editor to resolve this. It commonly impacts Server 2019 systems promoted to a domain controller wherein the UAC admin approval mode is reset and does not contain a value (Enabled or Disabled).

Windows cannot access the specified device, path or file. You may not have the appropriate permissions to access the item.

Security Settings / Local Policies / Security Options / User Account Control: Admin Approval Mode for the Built-in Administrator account.

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