I had a FATAL ERROR: Unhandled e0434f4dh and after researching it for about in hour I stumbled upon this easy fix.
Running 2010 AutoCad on Windows 7 and searched for "reg" I noticed a "cc_20080624_1633.reg" file, double clicked it and added what it wanted and wahla AutoCad is back and working again.
Now if someone could explain what happened that would be great otherwise maybe I should play the lottery today because it was just dumb luck that it worked as my knowledge of all this is limited.
I forgot to mention that I had reinstalled the Microsoft Framework 4.0 extended. After doing this AutoCad 2010 still didnt work but it could of done something.
Its in the user directory;
C:\users\my profile name\documents\
Ownership of the file is the IT guru, wierd...
Quite possibly a pemissions issue??
What was in the reg file? Can you send a copy? It would be interesting to see exactly what it did to the system - we are experiencing similar issues and a repair of the .net framework has not fixed it.
The file they are running looks like a backup from a cclean registry clean. The programs must have removed something that AutoCAD needed and putting those values back in by running the reg file fixed the problem. Would be interesting to see what values CClean removed