How do you start a PC game windowed instead of maximized?

I might need to start up the PC game Crysis windowed because I have a problem, so does anybody know how to do it? Thanks.How do you start a PC game windowed instead of maximized?
There should be an option in one of the menus to start up the game in a window instead of full screen.How do you start a PC game windowed instead of maximized?
when you start the game got to the options menu.


there should be an option that says ';fullscreen';, turn that off and click ';apply'; or ';save settings'; then it should turn black for a moment then it will be not fullscreen anymore. If you shut the game down and restart it, the game should have saved the settings and will always start in windowed mode untill you change it again.