acui24.dll is a dynamic-link library used by AutoCAD 2023 to load and manage AutoCAD’s user interface components and related plugins. If this file is missing, corrupted, or blocked by security software, AutoCAD may fail to start or display error messages like “acui24.dll not found” or “The program can’t start because acui24.dll is missing from your computer.” Common fixes include:
The most reliable way to restore missing core DLLs is through the Autodesk maintenance mode. Control Panel Programs and Features AutoCAD 2023 in the list, select it, and click Uninstall/Change When the installer window opens, select 2. Update Microsoft Visual C++ and .NET Framework Missing or corrupted dependencies often trigger DLL errors. Visual C++: Download and install the latest Microsoft Visual C++ Redistributable .NET Framework: .NET Framework 3.5 SP1 autocad 2023 acui24.dll