When I try to register the external applications to work with my version of Chrome, 56.0.2924.87 (64-bit), I just get a blank screen before I get the dialog box "External Protocol Request". I can see that there are registry entries in my system for the psrdp and inside Chrome's "Local State" file I also have "psrdp":false. It seems that there is just the one part missing but I can't see how to fix it. Any insight would be great!