Excellent advice and most likely the cause of your problems has already been given so I will only add this:
To determine if your unit is defective try recording sometime at 96K and 192K; something like a guitar, bass, vocal, etc. Do not use BiaB in this test. If you have no problems then your unit is not defective.

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