We too have faced similar problems using and we had worked out some changes in our systems which didnt requred much updation in the system.
Firstly , we had free the space in local drive where the Autocad has been installed and asked the user to avoid the users to save data on other drives so that Autocad can function normally, Usually Autocad a huge amount of usage back hand, hence we found the only solution to make it work is to provide as much as free space we can.
Secondly try deleting the temp files created by Autocad on the given location:-
del/q "C:\Documents and Settings\All Users\Application Data\Autodesk\AutoCAD Map 3D 2009\R17.2\MapCache\*.*"
You can add this in batch file which the user can run on some time intervals.
Thridly: In Autocad option menu you would find some sub menus which allows the users to change the saving path for temp and external files. refer the sanpshot. this frees the local memory of the machine hence avoids the shutdown of Autocad.