bruinator again around this place? Your charming personality and "karma" permeate through from your keyboard up to MDL servers... Unbelievable
Had the same problem, completely uninstalled it and installed Bitdefender Internet security 2015 again in my case. Works perfect.
Total 360 AV is a good alternative, this uses the Bitdefender engine OP is not looking for an alternative to BTS, rather asking for help why its not scanning or stopped scanning. BTW, the OP is banned and I think the scan problem is solved, why bumped such 'solved' thread.