Like any well designed software product, Windows is designed, developed and tested as an integrated whole.

India just went 3 years with no cases [of polio]. Pakistan is our toughest location right now because some parts of the Taliban have not allowed vaccinators to come in and have even attacked vaccinators. We are hopeful this will get resolved since no one wants their kid to be paralyzed. I spend a lot of time making sure the polio campaign is doing the best it can. We have great computer models that help guide our activities.

OK, I have a nickname. My family calls me 'Trey' because I'm William the third. My dad has the same name, which is always confusing because my dad is well known, and I'm also known.

If I had a dollar for every time someone made fun of me in high school-oh wait, I do!

The general idea of the rich helping the poor, I think, is important.

In energy, you have to plan and do research way in advance, sometimes decades in advance to get a new system that's safer, doesn't require us to go around the world to get all our oil.

Software will get to be somewhat more mature, ah, but it will never be as predictable as most areas of engineering.