I've recently installed AutoCAD 2011 and have this persistent problem.
1) open a drawing, then close the drawing window leaving autocad open
2) go to windows explorer, double click on a dwg
3) it tries to open then gives me an error- FATAL ERROR: Unhandled Access Violation Reading ...
Autocad 2011 - English Version 2.1
Dell Latitude E6410
NVIDIA NVS 3100M
8GB RAM
64-bit Windows 7
-Jake