This article was previously published under Q272627
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Upgrading Windows Millennium Edition (Me) to Microsoft Windows 2000Professional has not been tested for full feature functionality and is not a supported upgrade path.
A supported upgrade path from Windows Me to Windows 2000 is not available because Windows 2000 was released before Windows Me, and upgrade capabilities were not included. With many core changes such as the registry split, the removal of real-mode support, and new features such as Microsoft Windows Movie Maker and System Restore, Windows Me is not a candidate for upgrading to Windows 2000.
266270 Description of the Registry Files in Windows Millennium Edition
269524 Overview of Real Mode Removal from Windows Millennium Edition
267945 Description of the Windows Movie Maker Utility
267951 Description of the System Restore Utility in Windows Me