This issue has been closed as 'Won't Fix' due to an extended period of time without updates. If this issue is important to you please let us know by posting on the AnswerHub or UDN, and Epic will re-open the ticket for further review.
Swindow causes a packaged game to become a black screen and become unresponsive
Expected: Two windows would pop up or the build would fail if not allowed
Result: The build succeeds and causes the packaged game to become unresponsive
Head over to the existingAnswerHub thread and let us know what's up.