(AP) - COMING WEDNESDAY: Microsoft will release a preview of Windows 8.1, a free update that promises to address some of the gripes people have with the latest version of the company's flagship operating system.
SHOWCASE: Many of the new features have been shown off already. The Build conference, which starts Wednesday in San Francisco, will give Microsoft's partners and other technology developers a chance to learn more about it.
OTHER POSSIBILITY: There's speculation that Microsoft could show off a new, smaller version of its Surface tablet computers.
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