As Windows XP continued its decline, users who deserted the obsolete operating system shifted to Windows 7, not the newer Windows 8, more circumstantial evidence that commercial customers, not consumers, now drive PC sales. Data from analytics vendor Net Applications showed Windows XP dropped one percentage point in user share last month, ending May with 25.3 percent of all desktop and notebook systems. It was the third consecutive month that XP shed one or more points of user share.