1. You should have removed that last update. 2. Windows System Restore back to a month 0or year it all worked is the second option. 3. Removing all instances for VC++ on your PC, properly removing LDD3 from your system (and all Autodesk products), running a WIndows Registry Cleaner, restarting your PC then reinstalling LDD3 would be the dramatic fix. 4. Always turn off Automatic updates from Microsoft seems to be the norm for many users.