Thanks:) I tried comp mode and rebooting everything but still no joy. wonder if it could be an issue with resolution? Im running at 1920/1080. Other than that I am at loss, since Im not experiencing problems with any other games...
attaching dxdiag.
Thanks again:)

...and I should add that I have updated to the latest version with no difference in performance...

<t> Hi!<br/>
I have a LenovoY50 gaming laptop (8gig ram) running w8.1. the gameplay in BaB is extremely sluggish on my machine. If I attempt to zoom the map the game often freezes and sometimes ctd, especially during the combat resolution phase, when sound and mouse feedbak is totally out of sync ...