Windows File Manager

File Manager (WINFILE.EXE) is a file manager program originally bundled with releases of OS/2 and Microsoft Windows between 1988 and 2000. It is a single-instance graphical interface, replacing the command-line interface of MS-DOS to manage files (copy, move, open, delete, search, etc.) and MS-DOS Executive file manager from previous Windows versions.

Although File Manager was included in Windows 95 and Windows NT 4.0 and some later versions, Windows Explorer was introduced and used as the primary file manager, with file management via a two-pane view different from that of File Manager, and a single-pane view obtained by clicking a "My Computer" icon.

File Manager was reintroduced on 6 April 2018 as an open-source project which improves some aspects of the program, including being offered as a native 64-bit application. It has been made as an optional download for all modern releases of Windows (including Windows 10 and later) via the Microsoft Store.

The program's interface showed a list of directories on the left hand panel, and a list of the current directory's contents on the right hand panel. File Manager allowed a user to create, rename, move, print, copy, search for, and delete files and directories, as well as to set permissions (attributes) such as archive, read-only, hidden or system, and to associate file types with programs. Also available were tools to label and format disks, manage folders for file sharing and to connect and disconnect from a network drive. On Windows NT systems it was also possible to set ACLs on files and folders on NTFS partitions through the shell32 security configuration dialog (also used by Explorer and other Windows file managers). On NTFS drives, individual files or entire folders could be compressed or expanded. The Windows NT version of File Manager also allows users to change directory, file, local, network and user permissions.

From Windows 95 and Windows NT 4.0 onward, File Manager was superseded by Windows Explorer. However, the WINFILE.EXE program file was still included with Windows 95, 98 and Windows Me (16-bit executable), as well as Windows NT 4.0 (32-bit executable). The last 32-bit WINFILE.EXE build (4.0.1381.318) was distributed as part of Windows NT 4.0 Service Pack 6a (SP6a) in 1999, while the last 16-bit WINFILE.EXE build (4.90.3000) was distributed as part of Windows Me in 2000.

File Manager was first introduced in OS/2 versions 1.1, 1.2 and 1.3. The initial version was released in 1988 as part of OS/2 1.1 and was initially named as "File System" with the executable name PMFILE.EXE (with "PM" standing for Presentation Manager, the GUI of OS/2 first introduced with version 1.1).

The original version of File Manager was a 16-bit program that supported the 8.3 file names that were in use at the time. It did not support the extended file names that became available in Windows 95 – including long file names and file names containing spaces. Instead, it would display only the first six characters followed by a tilde character ("~") and a number, usually 1. More numbers (2, 3, and so on) were added after the tilde if more than one file name with the same initial characters existed in the same directory.

The first version of File Manager for Microsoft Windows was introduced as a 16-bit application starting with Windows 3.0 in 1990 with the executable name WINFILE.EXE (short for "Windows File Manager"). The 16-bit version distributed with Windows 3.1 and Windows for Workgroups 3.1 installations had a Y2K issue due to lexicographic correlation between date representation and the ASCII character set; colons and semicolons replaced what should have been '2000'. Microsoft issued corrected binaries for all Windows 3.1 environments in 1997.