What settings will this laptop play witcher 2 if it can play it at all?

Perhaps low - Medium if pushing it, but I would play it on a desktop PC. If you're unsure if a "Laptop" with play a game efficiently then you shouldn't be using the Laptop to game at all. Although this laptop seems to be well fitted out, they should never be used for gaming. I think what would be the biggest downfall here is the speed the CPU is clocked at and the GPU.