This exceptional account by WSJ's Shira Ovide on Microsoft Windows 10 looks at ways CEO Satya Nadella is changing Microsoft's culture and old way of doing business. Microsoft is changing its culture and strategy of charging for all its products. It will let businesses and individual buyers upgrade for free to the new Windows 10 product. This means $500 million less in sales revenues in 2015, but opens up new oppoortunities in sale of add-on apps and services on more devices, such as health sensors and smartphones. The failure to penetrate the smartphone business- with a meager 3% penetration for Windows in smartphones - is a problem facing Microsoft as it competes with Apple, Google and other companies. Terry Myerson describing the thinking behind this change at Microsoft puts it in a cultural perspective, saying that it should result in a more engaged user base. There is a sense that the space Microsoft is in stretches way beyond PC's to all the new computing devices now in place, including smartphones and other devices, with Windows taking up only 15% of these devices. Founder Bill Gates calls this "exciting" and is excited to see the reaction in the market....