Hi there !
First off all, I realy love the Xprotolab (HW 1.7) and was very exited to see that the USB connection is implemented. I flashed the new Firmware (1.78) but when i try to install the PC-Interface-Driver i get an Error:
"Driversoftware for the device was found but an error occured: Wrong Parameter"
It is not the original error message because i had to translate it.
I use Win 7 Professional 64-bit.
Is there anything i can do to make it work?
 

Does the "XMEGA Oscilloscope" appear on the windows device manager? You can also try installing in a virtual windows xp.

When i plug it in for the first time it is "XMEGA Oscilloscope", then i try to install the driver and get the described error and the device changes to "unknown device".
Tried the windows boot option to allow unsigned drives, but nothing changed.
I am installing Win XP mode and i am gonna try it.

Just tried the Win XP thing and the driver install works, but the Interface Software crashes at startup.
Without the Xprotolab plugged in it starts just fine.

The software is still under development, I know that it will crash if there is no data available from the Xprotolab, for example, if the device is waiting for the trigger. Is the green LED flashing when you try to start the software?
If it still is not working, just wait a few more weeks until I have a more stable release...

I am asking for information on the AVR Freaks forums: WinUSB
How about installing the driver on Win7 as administrator?