Do you want the latest version of Autodesk DWF Viewer installed with AutoCAD or any other installation.
Here is one tip:
If you have a network image of let's say AutoCAD locate this file:
Download the latest version of the DWF Viewer and replace it.
Make sure that these rows are in the setup.ini file (or the ini that you use):
PRODUCT_NAME=Autodesk DWF Viewer
If it's not there you can add it.
You also have to edit the row starting with SETUP_PRODUCT_NAMES= so it includes VIEWER
If you don't want the viewer to be installed you can remove it from the ini file as well.