I'm experiencing a high volume of calls where customers of Windows 10, 1511 were fully working and now are no longer working after they upgrade to 1607.
Our ActiveX control runs in a Trusted Site list, has a CASPOL setup to allow hardware access to the USB hardware interfaces. When the user tries to access the web page (and we have two URLs setup to allow access), one of the two might work. Same code, same permissions but now one stopped working. I have even gone so far as to create a second URL for one of the URLs and pointed it to the exact page that the other URL stopped working for. The new URL works fine.
If we create a new user account on this computer, and we add the site back to trusted sites, the problem is no longer an issue. What is blocking a site after this update? Is it registry or flat file?