Issue: When you tried to launch AutoCAD, the following error message was displayed and the product would not run.
FATAL ERROR: Unhandled Access Violation Reading 0x0000 Exception at 4048b9h
This error message indicates that the program installation has become corrupted. To correct the issue, the software needs to be reinstalled. This error occurs when certain files become locked during the uninstall/reinstall process. To reinstall AutoCAD correctly:
- On the Windows Start menu, enter acsignopt in the Search programs and files field and press Enter.
- Clear the Validate Digital Signatures and Display Special Icons option.
- Completely remove Autodesk software and reinstall as described in the article, Remove All Products from a Windows System.