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DisplayFusion should work find without Administrative privileges. There are two settings in DisplayFusion that require Administrative privileges:

• Settings > Options > Show in Windows desktop context menu
• Settings > Windows Logon > Allow DisplayFusion to manage the Windows Logon Background

My guess would be that the desktop context menu entries were created during installation (you can verify by right-clicking the desktop and seeing if the DisplayFusion entries are there). Disabling them requires Administrative privileges, unfortunately.

However, all of the other settings in DisplayFusion should still get applied correctly, even if you cancel the UAC prompts.

Please let me know if you have any other questions at all.

Thanks!