If you want to know how many cores BiaB will use get the free open hardware monitor:

https://openhardwaremonitor.org/

Start BiaB playing a looped song then start the open hardware monitor and it will show you how many cores are being used.

When you are at the checkout line and they ask if you found everything say "Why, are you hiding stuff?"

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware