i had this problem some years ago and found a fix that worked. and its now doing it again autocad closes when i try to open a drawing.so tried the same fix again and it still works. go to start type regedit find HKEY-CURRENT-USER then down to software/autodesk/autocad then follow the folders till you find "Recent File list" now delete this file.I think one of recent files may be bad? hope this works for you
It may pay to do a back up before you start but i have not had any problems