There is no window in row 19 of the 77W, but there is in the 77L. I also remember before 767 XM days that row 13 had no window - not sure which row that is now.
But I love the 777 lavatory windows in the middle of the J cabins. With the propensity for shades down no matter what, it's a refuge for seeing the marvels of the world below.