Upgrades FromMicrosoft Windows 98
Windows 98 Second Edition
Windows Millennium Edition
Windows NT Workstation 4.0
Windows 2000 Professional
Windows XP Home Edition (this will not upgrade from Media Center edition)
System RequirementsPC with 300MHz or higher processor clock speed recommended; 233 MHz minimum required(Single or dual processor system);* Intel Pentium/Celeron family, AMD K6/Athlon/Duron family, or compatible processor recommended
128 MB of RAM or higher recommended (64 MB minimum supported; may limit performance and some features)
1.5 GB of available hard-disk space*
Super VGA (800x600) or higher-resolution video adapter and monitor
CD-ROM or DVD drive
Keyboard and Mouse or compatible pointing device
*Actual requirements will vary based on your system configuration and the applications and features you choose to install. Additional available hard-disk space may be required if you are installing over a network. For more information, please see www.microsoft.com/windowsxp