Answer:
I make billions of dollars selling Windows. Who am I?
I call the trees my home, yet I never go inside, and if I ever fall off the tree I will be surely be dead.
Of these everyone has ten, part of two wholes at the arms end. What are they?
This is the drinkable phase of matter
What calls for help, when written in capital letters, is the same forwards, backwards and upside down?
I am a room that has a roof but no walls. What am I?