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What is the .W31 File Extension?

.W31 File Extension Description:

The Windows 3.1 version is the fourth major release of the Windows operating system. This version is still the basis for making personal computers much better and user-friendly.

Windows 3.1 requires the pre-installation of MS-DOS (Microsoft Disk Operating System), which starts the PC boot up process and provides the device drivers for the CD-ROM, network access, remote disk drive, and remote printer access. Startup files with the .w31 file extension execute Windows 3.1.

Files with the .w31 file extension start the setup program by running on a Microsoft DOS 6.2 operating system. It contains the command that starts the startup process and makes the preliminary checks to ensure that Windows can be started provided that:

•the minimum amount of memory required is available;

•Windows is already running;

•and the necessary binaries needed by Windows to execute are available.

The command also decides whether to start Windows in standard or 386 enhanced mode because this option depends on the available XMS memory and processor type. If it finds at least 1024 KB of XMS memory on an 80386 processor, then it starts Windows in enhanced mode. Otherwise, it starts in standard mode. If the computer only contains less than 256K XMS memory, refuses to start Windows at all.

During setup, Windows 3.1 alters the autoexec.bat and config.sys files by adding commands it needs for startup. These commands are contained in the files with the .w31 file extension, in which the values are maximized for Windows and do not take into account the available memory.

The setup.exe file is the primary command contained in the file with the .w31 file extension and is run from MSDOS. This command contains the following command-line switches:

* /N - can be used when you want Windows to run from a network server.

* /I - can be used to ignore hardware detection in cases where the hardware detection is suspected of causing setup to fail.

* /B - can be used to setup Windows with monochrome display attributes.

* /T - can be used to search the hard drive for TSR (terminate-and-stay-resident) programs.

* /C - can be used to turn off the actual search for certain TSR programs.

* /A - can be used when performing Administrative setup, which places Windows on a network server.

* /O:filespec - can be used to specify the assigned SETUP.INF file.

* /S:filepath - can be used to specify a direct path towards the precise setup disk(s).

* /H:filespec - can be used for the setup for Batch mode.

* /? - can be used to display instructions for running Setup from the MS-DOS prompt.

The basic Windows files contained in the W31 file extension are copied to the hard disk during the installation process of Windows 3.1. The user can change settings of the standard configuration files such as graphic adapter, keyboard layout, language support and others that are also contained in the files with the .w31 file extension during setup.

Author: Microsoft Corporation
Author URL:
Related Applications: Windows 3.1
Common Path: C:/ Windows


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Do you have errors with .W31 files?

The Standard Cause of .W31 files Errors:

A common and likely explanation for .W31 files errors is failure in the Windows program registry - cleaning is essential to avoid further damage in other software and/or devices. During the time the errors remain your computer stays at risk for possible blue screen errors, system failure and fatal crashes.

Symptoms of .W31 files Errors:

Common symptoms with .W31 files errors include poor computer speed, extended software start up speed, failure accessing documents, excessive suspensions in application functions, programs exits without an indication of error, screen halts and applications lock up.

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