I have the same issue which is weird for me I encounter the freeze when GSX is installed but when removed I dont have the issue, I have installed the Hotfix but I am not sure what is causing the issue for me still.
Could it really be GSX? I have the driver 616.84 installed.
To add further context, I am able to launch the Simulator, select the airport and then proceed with loading into the scenario/flight. When that happens and I get the Fly Now Yellow page, I sometimes get a freeze and sometimes not, my observation is when the latter happens is when GSX is not installed.