Make sure to check changelogs for any new changes!
The Windows is a phenomenon seen in many levels, they are really rare and only appear in the windows that are covered.
The Windows act like normal people who pass by the windows, they make silhouettes and go back and forth, sometimes they can stay still and try to make appearance of peeking through the window. When you open the curtains or blinds, the silhouette will disappear and the window will burn you alive.
They will only disappear after a certain amount of time, or if a flashlight is shined on the silhouette.
The Windows are black silhouettes that appear as shadows behind the coverage of a window.
Don't open any coverage of the windows if the silhouette of The Windows are there.
Let them be.
Shine a flashlight if you can on them.
Open any coverage The Windows are within.