This is a generic "Fatal Error" message, indicating that the application has generated an exception that could not be handled. - The following formating is used to indicate the address of the occured exception: Process id=0xeec (3820), Thread id=0xc8c (3212).
As you already mentioned it, this could be related to a damaged or corrupt (.NET) installation.
Repairing the (.NET) installation, from the controll panel should help to resolve this. Alternatively, you may fully re-install this requiered component on the affected system. - http://usa.autodesk.com/getdoc/id=TS16436702
Please let us know if this could help to resolve this.