run wow in 32 bit in that case
I have had the exact same problem. this is now fixed you can go into settings on battle.net app and choose the option to open WoW in 32bit instead of 64, when you do this you should be able to open HB
Thank you all for following my thread and addressing such an issue with me. I have had NO problems up until this last update where it permanently deleted the launcher and I don't know how to get it back. I have gone through and tried to run WoW from 32bit and I can't seem to get it to stay 32 bit when I open the game....So please Tony if you could address this issue. I'll keep trying to do stuff but it's really frustrating.
repair your wow installation and pick 32bit under Bnet launcher settings
the game keeps forcing itself into 64-Bit no matter what. Please fix!