The Windows Millennium Edition operating system is the successor of Windows 98 SE with some selected features of Windows 2000. The system core consists of a few parts of source code from Windows 2000. MS-DOS is furthermore necessary for the system start, DOS driver software are not used under Windows any more.
In comparison with the predecessor Windows 98, new features were added. Now it is possible to create compressed folders who moreover let themselves be encoded (screenshots 3-4). The search function from Windows 2000 was integrated into the Windows ME Explorer, the stability was improved. The Windows Registry was extended by one file for performance reasons. The Registry file Classes.dat is loaded only on demand, System.dat and User.dat are loaded statically. For any logged in user the respective User.dat is loaded from the profile directory. Benchmarks between Windows ME and Windows 2000 with current games have shown that Windows ME reaches slightly higher benchmark result with suitable hardware and driver software. The sales on market started on September 14th, 2000.