USB Key 64 Bit Signed Driver
To use the driver in WINDOWS 7 installations:
With your USB license key inserted and the existing unsigned drivers installed and working correctly Follow the links above and download files in the appropriate directory, save them somewhere convenient on your local machine
Locate the entry for "Spark USB Key" in Device Manager under Universal Serial Bus Controllers.
Select the option to update the driver
Choose to install from a specific location and direct the dialogue to the directory containing the new signed driver