In looking at Windows XP Professional, you can see there's much offered by the new operating system that can make your company more productive and also more secure from hackers and unauthorized access of resources. The Active Directory (and with it, Kerberos technology) brings a new level of authentication to accessing resources to the file level in Windows XP Professional. The integration of more streamlined features for security and greater support for integration with the Internet make Windows XP Professional definitely worth the testing and piloting. There's also the issue of whether Windows XP Professional will significantly change how individual systems and the broader network function in your company. That's the intent of this chapterto provide you with the necessary steps and information to make intelligent decisions on whether to upgrade to Windows XP Professional either in workgroups within your company or throughout the entire organization.