Give me a break - this never happened.
First the new head in the picture in the middle is too small for the rest of the body. Next, the lighting on the face is all wrong (It's coming from the wrong direction! Look where the light is on the model on the right, compared to the guy in the middle).
Besides all this, Microsoft has tons of money and they never would have went for a mere photochop to appeal to different countries or cultures, they would have reshot the entire picture, used different models in a different setting etc etc. Finally, this picture looks like a typilcal stock photo you can buy from istock.com.