Civil 3D 2012 program shut down when open 2010 drawings

[SCLewis]

I'm currently using Civil 3D 2012 and recently had my computer upgraded to Windows 7.  When I try to open an old drawing I created with Civil 3D 2010 in the 2012 program I get an AutoCAD Application box with the message "AutoCAD Application has stopped working. A problem caused the program to stop working correctly. Please close the program. Close the program."  I then have no choice but to close the program.  I was able to open the 2010 drawings with 2012 fine with Windows XP.  Any ideas?

[wfberry]

I would to a repair of Civil 3D 2012.

Bill

[g_k50]

Change the properties of the dwg file to point to the updated AutoCAD Civil 3d executable.

Select the "change all files of this type" box

[dgorsman]

What happens if you let it run for a while?  Win 7 is quick to apply the "Not responding" flag when an application is actually taking a long time to process e.g. converting a lot of content or searching for support files.

[SCLewis]

Thanks for the suggestion.  I tried that and the problem still persists...