Bill Gates

Microsoft made it official Tuesday that it has hired Satya Nadella as its new CEO. In addition Bill Gates, while dropping his chairman title, will "devote more time to the company," in his new role as founder and technology adviser.

What do you do when you put a lot of money into a seemingly bold project,  fail miserably at gaining a foothold in the market and lose more money than Bill Gates can count? If you're Microsoft, you go for a do-over.

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