Fewer than one in eleven of the PCs being used in large or very large enterprises runs Windows Vista, according to survey results released Wednesday by Forrester Research.

Of the 50,000 enterprise users surveyed by the analyst firm, 87.1 per cent were still running Windows XP at the end of June, compared to 8.8 per cent for Vista. According to author Thomas Mendel, that implies that the majority of PCs upgraded to Vista were those running older versions of Windows, such as Windows 2000 or 98.

"Vista is 'new Coke,'" Mendel wrote, comparing Microsoft's flagship OS to the ill-fated soft drink. Enterprises still on the fence about Vista would be wise, he said, to "consider following the lead of Microsoft's important partner Intel and re-evaluating the case of Vista."

Mendel's comments undercut the momentum for Vista claimed by Microsoft, which says it has sold 180 million licenses for its 18-month-old operating system to PC makers and end users.

Vista still has double the share of Macs among big businesses, however. The share of Macs grew from to 4.5 per cent in June from 3.7 per cent in January 2008. 80 per cent of those are Intel-based Macs.

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