AutoCAD 2010/2011/2012 DWG Format

[#1]

FATAL ERROR:  Unhandled Access Violation Reading 0x2cbff3e0 Exception at 77645098h

FATAL ERROR:  Unhandled Access Violation Reading 0x2e36f6e0 Exception at 77645098h

FATAL ERROR:  Unhandled Access Violation Reading 0x2965f2c0 Exception at 77645098h

etc...

what this error means?

program

autocad 2011

my system

cpu i7-720qm

vga ati mobility r. hd5730

ram 4gb

OS win7 premium

can anyone help me about this? program close itself. i cant solve with internet search.

[#2]

What are you doing in AutoCAD when this type of crash happens?
Can you repeat it regularly using the same commands that trigger it, or is it random and hard to predict?

[#3]

last error happened while i was exitting from the distance "di" command. others, i cant remember now.

[#4]

today autocad 2011 crashed 3 times again. every problem appears in different commands. for example i tried to erase a line, copy a line etc. i tried to find a solution on internet but i couldn't.

i need a real help.

thanks

[#5]

i tried this,

try if disabling the Digital Signature Icons display helps:

1. In Windows Explorer, right-click on a drawing file. In the context menu, click Enable/Disable Digital Signature Icons.
2. Clear the Validate Digital Signatures and Display Special Icons check box.
3. Restart the system.

nothing changed.

[#6]

http://forums.autodesk.com/t5/AutoCAD-2011/dist-command-error/td-p/2664091

this topic tells the same problem.