Microsoft Windows XP Professional Upgrade with SP2 This Upgrade version is for owners of Windows 98/Windows 98 Second Edition; Windows Me; NT 4.0; Windows 2000 Professional; & Windows XP Home Edition Integration with Microsoft Windows Servers and management solutions. Windows operating system designed for both business and home users Tools for instant messaging, voice/video conferencing, and application sharing Premier mobile support for working offline or accessing computer remotely Greater security, including the ability to encrypt files and folders Integration with Microsoft Windows Servers and management solutions Windows operating system designed for both business and home users Tools for instant messaging, voice/video conferencing, and application sharing Premier mobile support for working offline or accessing computer remotely Greater security, including the ability to encrypt files and folders