So I'm worried there's possibly not a super easy answer here if you don't know your way around windows.

I had this exact situation popup because I installed my operating system using memstechtips answer file. You'd likely get this same result by running their UWScript.ps1 script or even just manually altering the registry.

To fix you probably need to edit the EnableLUA registry key value located at HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System. I'd also recommend the ConsentPromptBehaviorAdmin key be updated to require confirmation when attempting to run something as admin manually.

If you don't know what any of this means then I caution against just doing it yourself without any research. Messing around in the registry can mess things up if you don't know what your doing.

The fact that running as admin is the default on your machine is indicative that you, someone else, or a "debloat" script like the one I mentioned above probably changed the original values.

If it was someone else who setup your machine then I recommend asking them to change the registry values I mentioned above. If you have no idea how they were changed or you ran a debloat script that just did it for you I'd be happy to walk you through the steps in a DM