Failing installation on Windows Embedded Standard 7 (WES7)

Target: WES7

Arduino: UNO R3, 1.5.6r2beta

Issue: "windows found driver software for your device but encountered an error while attempting to install it, Driver is not intended for this platform"

I tried what is described in this post: A service installation section in the INF is invalid - Installation & Troubleshooting - Arduino Forum ,
also what was pointed at in another post: http://www.maxvalente.com/2013/03/installing-arduino-on-windows-embedded/

none works... Anyone had better luck?

I have 2 WES7 PCs, same issue on both...
Thx
L