The overarching claim in the suit is that Microsoft's Windows Vista Capable sticker program, which theoretically let customers know which PCs were capable of running Vista before the OS was made generally available, was an example of deceptive business practices and violated consumer protection laws.

Microsoft's hardware partners began shipping PCs with the "Windows Vista Capable" logo in April 2006. However, the designation was potentially confusing, because a PC with the label was only guaranteed to run the least expensive, most basic version of Vista.

The case is scheduled to go to trial April 13; however, in last month's filing plaintiffs asked that the judge push back the trial date in case class is reinstated to give others time to join the suit. The judge has yet to respond to that filing.