AutoCAD, F/X CAD, or Civil 3D Crashing or Freezing When You Open a Drawing
Updated on: May 04, 2026
Issue:
CAD is freezing, crashing, or failing to respond when you open a drawing.
Causes:
The issue is resulting from an update to Microsoft Windows 11.
Solution:
You can address this issue quickly by navigating to the folder C:\Program Files\Autodesk\AutoCAD 202x* and renaming the file AdDownloaderCore.dll in that location.
*Where 202x is your year version of CAD
You can rename this file to something like AdDownloaderCore-old.dll
