Hi
I have been trying to calabrate the Guidance sensors using the Assistant. The Assistant installs fine, when the driver installs it fails. When I try to install the driver manually I get the following message.
Window found the driver, but hash file not present.


This usely means the driver is not signed and will not load in Win8

This question is answered in another thread: http://forum.dji.com/thread-28731-1-1.html