Microsoft KB Archive/151667

= Description of Windows Files Located in the Root Folder =

Article ID: 151667

Article Last Modified on 1/19/2007

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APPLIES TO


 * Microsoft Windows 98 Standard Edition
 * Microsoft Windows 95

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This article was previously published under Q151667



SUMMARY
This article describes some of the Windows files you may find in the root folder of your hard disk.



MORE INFORMATION
Autoexec.bat - Windows configuration file

  This file contains commands that should be run by Windows before the 32-bit portion of the operating system is started.

  This file is necessary only if you need to load a real-mode driver.

Autoexec.dos - Previous MS-DOS Autoexec.bat file

  This file contains the original Autoexec.bat file from the previous operating system. It is used if you boot the previous operating system.

Bootlog.prv - Previous Windows startup log file

  This file records the progress of the previous Windows startup process. When you request a logged boot (or if Windows performs one  automatically), the previous Bootlog.txt file is renamed to Bootlog.prv before the new Bootlog.txt file is created.

  This file is not necessary for the proper operation of Windows and can be deleted.

Bootlog.txt - Windows startup log file

  This file records the progress of the Windows startup (boot) process. It is created if you request a logged boot, and is also created automatically by Windows if Windows detected that the previous boot was unsuccessful.

  This file is not necessary for the proper operation of Windows and can be deleted.

Command.com - Windows command line processor

  This program is the Windows command line processor.

  This file is necessary for the proper operation of Windows and should not be deleted.

Command.dos - Previous MS-DOS Command.com file

  This file contains the original Command.com file from the previous operating system. It is used if you request to boot the previous operating system.

Config.dos - Previous MS-DOS Config.sys file

  This file contains the original Config.sys file from the previous operating system. It is used if you boot the previous operating system.

Config.sys - Windows configuration file

  This file contains parameters that describe the real-mode (16-bit) drivers that should be loaded into memory as part of the Windows startup process.

  This file is necessary only if you need to load a real-mode driver.

Cvt.log - Drive Converter (FAT32) Log File

<pre class="fixed_text">  This file is created by the Drive Converter (FAT32) when you convert a drive to FAT32 and may be useful for troubleshooting failed conversions.

<pre class="fixed_text">  To remove this file, delete it from Windows Explorer.

Detlog.old - Previous Windows detection log file

<pre class="fixed_text">  This file records the progress of the previous Windows hardware detection process. When you request that new hardware be detected, the previous Detlog.txt file is renamed to Detlog.old before the new Detlog.txt file is created.

<pre class="fixed_text">  This file is not necessary for the proper operation of Windows and can be deleted.

Detlog.txt - Windows detection log file

<pre class="fixed_text">  This file records the progress of the Windows hardware detection process. It is created during hardware detection and is consulted by  the hardware detection recovery process if the previous attempt to   detect hardware caused problems.

<pre class="fixed_text">  This file is not necessary for the proper operation of Windows and can be deleted.

Io.dos - Previous MS-DOS Io.sys file

<pre class="fixed_text">  This file contains the original Io.sys file from the previous operating system. It is used if you boot the previous operating system.

Io.sys - Windows MS-DOS

<pre class="fixed_text">  This file contains Windows MS-DOS.

<pre class="fixed_text">  This file is necessary for the proper operation of Windows and should not be deleted.

Logo.sys - Windows logo

<pre class="fixed_text">  This file contains the Windows logo that is displayed as part of the startup process.

<pre class="fixed_text">  Note that Windows 98 does not use the Logo.sys file. If you are running Windows 98, this file may not exist in the root folder.

Msdos.dos - Previous MS-DOS Msdos.sys file

<pre class="fixed_text">  This file contains the original Msdos.sys file from the previous operating system. It is used if you boot the previous operating system.

Msdos.sys - Windows configuration file

<pre class="fixed_text">  This file contains parameters necessary for the early phases of the Windows startup process. For more information, please see the following article in the Microsoft Knowledge Base:

ARTICLE-ID: 118579

TITLE : Contents of the Windows Msdos.sys File

<pre class="fixed_text">  This file is necessary for the proper operation of Windows and should not be deleted.

Oemlog.txt - Windows Original Equipment Manufacturer (OEM) log file

<pre class="fixed_text">  This file records the progress of the Windows OEM preinstallation process.

<pre class="fixed_text">  This file is not necessary for the proper operation of Windows and can be deleted.

Scandisk.log - ScanDisk log file

<pre class="fixed_text">  This file is created by the ScanDisk program to record the result of   the most recent disk scan.

<pre class="fixed_text">  This file is not necessary for the proper operation of Windows and can be deleted.

Setuplog.txt - Windows Setup log file

<pre class="fixed_text">  This file is created by Windows Setup to record the progress of the installation procedure. It is consulted by Windows Setup as part of  installation recovery.

<pre class="fixed_text">  This file is not necessary for the proper operation of Windows and can be deleted.

Suhdlog.dat - Windows Setup hard disk log file

<pre class="fixed_text">  This file contains a copy of all Master Boot Records and Partition Boot Records on the system both before and after the upgrade to Windows. This file is used by Windows Uninstall to restore the hard disk master boot sector as part of the uninstall process.

<pre class="fixed_text">  To remove this file, click "Old Windows 3.x and MS-DOS system files" in   the Add/Remove Programs tool and then click Add/Remove.

System.1st - Windows first registry

<pre class="fixed_text">  This file contains a copy of the original registry created by Windows setup.

<pre class="fixed_text">  Although this file is not necessary for the proper operation of Windows and can be deleted, it is recommended that the file be retained because it can be used to restore the registry should it become damaged.

Videorom.bin - a copy of your onboard video card's ROM.

<pre class="fixed_text">  This file is used by Windows 98 to support multiple monitors. It is created during startup, when the system has only one video adapter (if the file does not already  exist). If you delete this file, you lose support for multiple monitors until you remove all but your primary video adapter and restart Windows (so that  this file can be re-created).

W95undo.dat - Windows 95 uninstall data file

<pre class="fixed_text">  This file contains a compressed backup of Windows 3.x files that were replaced as part of the Windows 95 installation process. It is created by Windows 95 Setup and is used as part of the Windows 95 uninstall process.

<pre class="fixed_text">  To remove this file, click "Old Windows 3.x and MS-DOS system files" in   the Add/Remove Programs tool and then click Add/Remove.

W95undo.ini - Windows 95 uninstall script file

<pre class="fixed_text">  This file contains a listing of files backed up in the W95undo.dat file. It is created by Windows 95 Setup and is used as part of the Windows 95 uninstall process.

<pre class="fixed_text">  To remove this file, click "Old Windows 3.x and MS-DOS system files" in   the Add/Remove Programs tool and then click Add/Remove.

Keywords: kbinfo kbsetup KB151667

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