Answer:
I make billions of dollars selling Windows. Who am I?
If the day before yesterday is the 23rd, then what is the day after tomorrow.
What never gets any wetter no matter how hard it rains?
Where is the ocean deepest?
It is something you will never see again.
I am the fountain from which no one can drink. For many I am considered a necessary link. Like gold to all I am sought for, but my continued death brings wealth for all to want more.