I wrote this guide (bose_win7_workaround_update1.pdf). I have a much easier solution to the issue for most Broadcom-based adapters available for this now at http://plugable.com/2017/02/07/bluetooth-audio-problems-cant-get-your-bose-quietcomfort-35-connected-check-here-first/
In the article I also explain why these issues are happening. If you have questions or feedback, please share it as a response to the article at Plugable.com
Thank you.