I download new patch notes and since then cant play due to an error that say : DierectX 11 is not available in this machine. Direct3D 11 is available under windows 7 or better windows vista with DirectX 11 microsoft update. DirectX 11 is not supored under Windows XP. …
You do have DirectX 11 right?
Might want to post your dxdiag listing as that can be useful in spotting the cause of this kind of error.