 Two consumers sued Microsoft in United States federal court alleging the "Windows Vista Capable" marketing campaign was a bait-and-switch tactic as some computers with Windows XP pre-installed could only run Vista Basic, sometimes not even running at a user-acceptable speed.In February 2008, a Seattle judge granted the suit class action status, permitting all purchasers in the class to participate in the case.Released documents in the case, as well as a Dell presentation in March 2007, discussed late changes to Windows Vista which permitted hardware to be certified that would require upgrading in order to use Vista, and that lack of compatible drivers forced hardware vendors to "limp out with issues" when Vista was launched.