The first thing that I'd try to see if it makes a difference is to start BIAB by right-clicking on the shortcut and selecting "Run as administrator".
If that brings no joy, change the 'Audio Driver Type' from ASIO to MME under "Options | Preferences | Audio".
Both ASIO and MME sound identical. The only difference is that ASIO allows realtime instruments such as a synth keyboard to play with reduced latency. If you have no external controller instrument attached to your computer, MME will do the job.