How to stop Minecraft from going full screen when it launches?

When it launches, it goes full screen. Because of that, the screen goes black and I can't do anything with the computer except shut it down. If you tell me "Ctrl, Alt, Delete" or "Press Esc" I will wring your neck.

Added (1). Thanks, Lenyung. But first it shows the Mojang logo, then goes full screen, leaving me with a black screen. Pressing F11 doesn't work either.

I think it's something with the display, because the game still runs. I know because I can hear the music that always plays at the title screen.

I'm sorry but you need to press esc(For ingame) :c
1.Press esc
2.Options
3.Video Settings
4.Find and click on a box called "Fullscreen: On"
5?
6:Profit

Optional: Press F11(default button)

Other option:
1.Wait for minecraft to start
2.Click Options
3.Repeat above
4.Profit

Enjoy brother or sister