Although the consumer version of Vista saw tepid sales during its first week on store shelves, the new Microsoft operating system did seem to help PC sales. Sales of boxed copies of Windows Vista at retail stores significantly trailed those of Windows XP in each product's first week on shelves. Market research data showed that the number of copies of Vista purchased was nearly 59 percent lower than the number for its predecessor. Revenue was also down, but less dramatically, with the dollar value of first-week Vista sales off 32 percent from that seen with XP.