Issue:
You are unable to drag and drop files from Windows Explorer onto AutoCAD Start screen to open them, or when double-clicking on a DWG file it opens AutoCAD but not the drawing you double-clicked on, or you have a Logitech Mouse with Programmable Buttons and the custom keystrokes applied to the buttons no longer function in AutoCAD
Causes:
Drag and drop, double-click and the mouse button programming are all part of the Windows functionality, and an update to Windows causes this issue to occur only for AutoCAD-based Products.
Solution:
The following Windows Registry fix was used to resolve this issue:
1. Press Windows + R button.
2. Type Regedit in the dialog that appears.
This will open Windows Registry Editor.
3. Navigate to:
Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion
\Policies\System
4. Find the key EnableLUA, and change 1 to 0.
5. Press OK and restart the computer
Warning! Problems caused by improperly editing the Windows registry could render your computer/operating system unusable. Microsoft provides a wealth of critical information that you need to know about the registry in the Microsoft Knowledge Base. Use the Microsoft® Registry Editor only at your own risk and only after backing up the registry as well as the system.dat and user.dat files as outlined for your operating system in the Microsoft Knowledge Base. Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.
Here is the information regarding that specific key
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