This is a tip for AutoCAD 2009, or later. Try this – Open AutoCAD and Save and close any important files you have open. Go to the big Red ‘A’ and hover over it with your mouse… Now double click…
This space has intentionally been left blank, to heighten the drama…
That’s right, double clicking the Big Red ‘A’ Shuts Autocad down. This is not a bug, It is what is supposed to happen…
Aren’t you glad you found out about that Before it happens while editing a really important drawing!
For more AutoCAD troubleshooting tips, check out this post on the Pickfirst variable.