I have a friend with a brand new HP laptop and Windows 8 on it.
It was impossible to install the drivers for Uno 3. The installation process recognize the device as "Ardunio", but the install failes. What I can see is that there is only USB 3.0 on all ports on the laptop.
I have installed units on many other PC's with Windows 8 without problems so I think USB 3.0 is the key.
Can someone acknowledge this? Is there development ongoing to upgrade the drivers to USB 3.0?