We are experiencing a problem with some files where they are becoming increasingly slow to open.
It started with a single user's computer and anything they would open and save would become infected.
Opening the file doesn't do anything, but if you copy objects from that file into any other file, it then becomes infected.
The issue is much like the DGN one, but that is not the problem.
If anyone has any ideas, I would greatly appreciate it.
I have attached a simple cover sheet file that has the issues.
We're currently running Civil 3D 2013.
The really odd thing is, if you open the file with plain autocad, MOST of the files open without issue.