FIX: USB Driver installation fails on Windows 7/8

[skavan]

If, like me, you have persistent problems trying to install the DJI Driver Installer, here's the fix:

The third-party INF does not contain digital signature information
http://answers.microsoft.com/en-us/...-contain/7c3f299b-3483-4c96-8c44-87c7451af222

Hope it helps.