The best and most cost-effective way to acquire Windows software is preinstalled on a new PC. However, if you find that you have inadvertently acquired non-genuine software, you may be eligible to use the new Get Genuine Kit for Windows XP Professional to get legal.The Get Genuine Kit is only available for use on fully assembled PCs with a previously installed counterfeit, pirated, or otherwise illegal or unlicensed copy of Windows XP Professional. Your Microsoft reseller can help you determine if the Get Genuine Kit is right for you.