Zombinomicon

Yep, that did it. Thanks for the quick response. For your knowledge, I did not have to disable Bitdefender. Instead, once I opened the Bitdefender GUI, I then saw the notifications had gone up. Click on Notifications, then it will list that x-aviation was blocked. Simply click the "Add exception" option below each event and it will no longer block it. I outlined that just to help - better to allow the exception than to disable AV. Hopefully, that helps. Thanks again! UPDATE: To be clear, you were dead on with Bitdefender being the problem!

I'm trying to install RWC 1.1 and Skymaxx 4.73, but I get this error in sim and activation window never closes: