INTRODUCTION IN OCCASIONAL PROGRESS: There always seem to be more interesting things to do than write introductions.

The Windows Explorer

To almost all users, every time they start Windows, the main sign that Windows has finished starting is the appearance of the desktop and taskbar, with its Start button and tray notification area. Though these are in no way essential to Windows as an operating system or even to the Win32 subsystem in user mode, they are the look and feel of Windows as ordinarily experienced. The program that starts all this is EXPLORER.EXE, albeit with the overwhelming bulk of the work being done in DLLs.