I just wanted to let you all know that I tried to replicate the issue once again, and the results are the following: You need to resign the driver using the process stated in the link above and the problem will be fixed. This is why you can't replicate the issue when updating because that still allows the old signing process. Microsoft has changed the way that kernel drivers have to be signed only for fresh installs of the Anniversary update.
Driver Signing changes in Windows 10, version 1607 – Windows Hardware Certification blog Once you have replicated the issue, you can fix it by following the Microsoft's guidelines here: If that does not work you can try installing from an ISO created using the Media Creation Tool. Make sure you select to wipe everything when going through the options. The refresh tool allows you to install a fresh version of the Anniversary update. Updating and/or Windows 10 default recovery options are not the same as using the refresh tool. 'Perfect, I will try that, even though we also did that already, we installed he anniversary update on a PC that had Windows® 10 already installed and the results were the same.'
