Did you try installing the drivers as topg mentioned? Are you running an Operating System evaluation version? See community post: https://communities.intel.com/thread/61103
Can you try a different operating system?
Sorry, I did not install the drivers - that solved the network issue. Thought W8.1 would deliver drivers - at least to get basic network up and running.
The network could be installed via an exe file, but the others seemingly not. Have tried to run the Intel Driver update Utility 2.0, but most of the drivers fail during installation. In my Control Panel / System, Network controller and SM-bus controller are marked with exclamation marks. Seems as if something is not o.k., although I have now internet access.