I have similar crack on my basement. It is also from the corner of a window
all the way to the ground.
My inspector told me
"This is a typical crack in the concrete. Concrete has water ,sand, Portland
cement and stone. When the water evaporates during the curing process the
concrete shrinks and cracks. All foundations crack. It may be a problem when
wall cracks are greater then a ¼ inch, have deflection, travel
horizontal, are in a v pattern on an outside corner or water is leaking
through.