I am not using the separate keyboard, where is the windows key and the function key?
You need to turn on the Standard Keyboard layout:
- From the Charms bar, choose Settings.
- Choose Change PC Settings.
- Tap General, and scroll down to the Touch Keyboard settings on the right side.
- Tap the toggle called Make the Standard Keyboard Layout Available.
That adds the Standard keyboard to the keyboard chooser. (It's the fourth keyboard icon from the left, right next to the icon that closes the keyboard.)