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Windows 7 public previews slow Vista's growth, says metrics firm

By Gregg Keizer

June 1, 2009 03:46 PM ET

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Windows 7

Windows 7: Full coverage

The first full week after the May 4 release of the RC (May 11-17), Windows 7's share increased 0.06 of a percentage point over the previous week. The next two weeks, however, posted smaller gains over the prior week. During the week of May 18-24, for instance, Windows 7 grew 0.04 of a percentage point over the week before; during the week of May 25-31, the new OS gained just 0.03 of a percentage point over the week before.

And Windows 7, even in RC form, has been unable to stem the continuing slide of Windows overall. Net Applications pegged the operating system with an 87.75% market share for May, down 0.15 percentage point from April's 87.9%.

Apple's Mac OS, on the other hand, grew 0.08 of a percentage point in May, accounting for 9.81% of the market. That mark was Apple's best since January's 9.93%, and again put the operating system on the road to the magic 10% mark. Assuming Mac OS posts gains equal to its 12-month average, it would break the 10% bar in early July.

Net Applications' May OS data is available on its Web site.

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