On Windows 7 the installation of the Crazyradio dongle will fail by default and then you will have to install the driver manually. This page documents the procedure to install the Crazyradio driver on Windows 7. The procedure should be very similar on Windows 8?

When connected, the Crazyradio dongle fails to be installed automatically by Windows

When that happen, open the device manager, find the uninstal USB device and right click on it to update the driver

In the window popping-up chose “Browse my computer for driver software” and then point out the decompressed driver folder you downloaded.

Click next, accept installation without verification, and the driver is installed!