Options:
A). Some new office and home windows are not meant to be opened. If there are no hinges or the window is a single pane with nowhere to slide, it likely does not open.
B). A window that is not meant to be opened means that the window should not have a window that is locked or appears to have been locked before. Fix any possible problems with the window with a repair kit.
C). It may be hard to see in a spy window, but would your window look original. Look for cracks, where debris may collect.
D). The window itself might be screwed into place if it is tampered with. Cracked glass will push air into the window.Choose from options above and answer: What most naturally follows?

How to open a stuck window
Examine the window.
Look at both sides of the window, interior and exterior.
Make sure it is a window that is meant to be opened.
Answer:
A).