Dear Sir,
That is strange. You can surely install that manually, do the following:
1) Control panel > Network and Sharing Center > Change adapter settings (from the left pane)
2) Right click on your peripheral (installing protocol will affect all the peripherals anyway, but better safe than sorry) and choose "properties..."
3) Press "Install...." button, choose "Protocol" and press "Add..." button
4) Press on "Have Disk..." button and browse to "C:\Program Files (x86)\4dsp\FMC Board Support Package\Driver\4dspnet.inf", press "OK" and again "OK"
5) Open a command prompt with elevated administrator rights (Right click on the "Command Prompt" shortcut in the start menu) and choose "Run as administrator"
6) Type net start 4dspnet in the command prompt
you should get something like (the x86 is a typo)
C:\Windows\system32>net start 4dspnet
The 4DSP EthernetII Protocol Driver x86 service was started successfully.
C:\Windows\system32>
If for some reason you get a complain about service already started do a net stop 4dspnet and then a net start 4dspnet
I know this is many steps but this is the standard way to install a protocol driver on Windows.
I hope that helps,
Arnaud