Windows Vista got off to a slow consumer start compared to its predecessor. U.S. retail Vista sales were significantly less than Windows XP during their respective launch weeks.
NPD released sales figures on Thursday for software that end users install themselves on a computer. Windows Vista unit sales decreased 58.9 percent in units compared to Windows XP during their respective launch weeks, while revenue decreased 32.1 percent.
Vista's launch starkly contrasts to Office 2007, which sales increased more than 100 percent compared to Office 2003 during their respective launch weeks.
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