The launch button for Windows is the Start button on the bottom left corner.
the F1 button
Nuke launch button
Current versions of Microsoft Windows contain a Start button, Quick Launch toolbar, taskbar, button area, and the tray status area. So do various implementations of Linux distributions.
It's the left control key.
Press the fire button
Start button.
Click the launch tutorial button and follow all the guides.
Assuming you mean the "Show Desktop" button, you right click the start back and click "Properties" then check "Show Quick Launch".
You have to launch all the landers and it will refuel and then at the spot where you turn on the power theres a button click it. The rocket will take off. (if you have a ray gun you can shoot it down)
Quick launch
to launch the weapons you need to press the L button
Hold down the Home Button to Launch Voice Control!