If you disable UAC completely you can drag & drop from anywhere again. To do this you can't use the slider in the Control Panel because that only brings the UAC level down to 1. Make this registry change, reboot, and you can again use your computer like god intended.
ref - https://stackoverflow.com/a/30281987
ref powershell - https://social.technet.microsoft.com/Forums/windowsserver/en-US/0aeac9d8-3591-4294-b13e-825705b27730/how-to-disable-uac
JavaScript:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
"EnableLUA"=dword:00000000ref - https://stackoverflow.com/a/30281987
ref powershell - https://social.technet.microsoft.com/Forums/windowsserver/en-US/0aeac9d8-3591-4294-b13e-825705b27730/how-to-disable-uac