unsigned driver win7

I am trying to get the automotive installed on a win7 pro machine. The cypress and Wdf both appear as digitally unsigned. The drive version 1.3.3.1 from todays download from your site. There was an earlier topic on this subject but it appears a reboot clear their problem. I have done two fresh installs and reboots and still have the problem.
thanks

Uninstall all the software, and then make sure that you have installed all the latest updates from Microsoft before trying again.If it still causes problems then email support@picotech.com