Hello!
I had the same bluetooth issue on my VAIO svf15a1z2r. Hope my solution will help you too.
So, after installing ac 7260 you need to uninstall old broadcom drivers first. In VAIO and other broadcom-based devices it called something like "WIDCOMM Bluetooth Software" in windows software manager.
Just after that install driver pack from Intel (links are somewhere above in thread) and it should work without any additional movements.
Please tell if my advice will be useful.