i actually had the same thing happen multiple times during my setup. it's an internet sharing error that occurs.
basically i disabled internet connection sharing in the network connection settings, then restarted the installation and it worked
Open network connection settings > right click on the network and select properties > in the general tab select TCP/IP and click properties > uncheck internet connection settings > apply settings > run setup form the cd
also make sure your antivirus settings are not conflicting either
this should fix the issue because basically what i think was happening for me was the setup was unable to setup internet connection sharing because i had another network setup for sharing.
so when i ran the setup with the connection sharing disabled the automated installation was able to continue with the setup.
hopefully this works for you.