Install Without a Network Connection
If company security disalows connecting to the network during software installations, try turning off the Optional selections during setup.
Download and install the .msi files from Bentley's Software Fulfillment Center website. Don't foget to right-click the .msi file and select "Run as Administrator"
During ABD setup, if connectivity to the Internet is unavailable, the Install button may not activate so scroll down the list of Installed/Required options and turn OFF the options for Structural Synchronizer V8 x64 and Visualization Content. These should have a Status of "Optional".
The Install button should now be active and the installation can be completed.