Penumbra Issues

[DcalPanda]

sry if this was already covered in an existing thread but here we go:
i just got Penumbra black plaque and Requiem from steam. i try and play the game and the resolution is all big and cropped off. when i minimize and maximize the game again it goes to normal but on top of this my mouse pointer is stuck in the top left corner of the screen..
plzz help.
again sry if this was already covered some where.