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Microsoft may have a tough time building significant market share for its new Internet Explorer 9 (IE9) browser because eligible users are in the minority.

Several analysts agreed that Microsoft has its work cut out for it, at least in the short term, because IE9 won't run on Windows XP, the aged-but-still-dominant operating system.

Microsoft omitted the still-popular XP from the supported OS list because, among other things, IE 9 speeds up page rendering and composition by tapping the graphics processor in newer PCs. Windows XP lacks support for the Direct2D API, which IE9 uses to accelerate content rendering.

The decision means that only a subset of machines will be able to run IE9, either in its preview or final form, until those systems and Windows XP are replaced by new hardware and Windows 7.

"That's an issue in terms of growth, at least for the next 12 to 18 months as more companies and consumers migrate to Windows 7," said Al Hilwa, an analyst with IDC. For that reason and others, Hilwa said not to expect a "tidal wave change in browser share. Microsoft's battle is not to lose much more share."

Computerworld has the details HERE!