@RAZ3R_BLAD3 Try this on your computer. Right-click on Notepad, choose run as administrator then try and drag a file into it. Then try the same thing again by running it normally.
Maybe OpenIV uses a system that bypasses the normal drag-and-drop processing if it works in administrator mode. Although going off this page, it says basically what I said about it. http://openiv.com/bugs/view.php?id=351
I know when I created a programme to write rules to the Windows firewall, I had to jump through all kinds of hoops to get it to work with drag-and-drop... A lot of developers complained to Microsoft but they said that's just how it is designed.
There's more info here if you're interested. https://blogs.msdn.microsoft.com/patricka/2010/01/28/q-why-doesnt-drag-and-drop-work-when-my-application-is-running-elevated-a-mandatory-integrity-control-and-uipi/