According to Business Insider's Chart of the Day feature, Microsoft doesn't get much, if any, operating profit from Xbox 360 or Xbox Live.
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The company's entertainment and devices division only just started making money again while the online services division remained a sinkhole. Most of the company's money still comes from Microsoft Word and Windows products. Incidentally, Windows 7 just surpassed Vista on Steam as PC gamers' operating system of choice (XP is still in the lead).