Article ID: 161020 - View products that this article applies to.
This article was previously published under Q161020
Microsoft stands behind its Windows 95 product, and develops updates for Windows 95 as needed to resolve critical customer situations. This article provides general information about Windows 95 updates. Topics in this article include:
Windows 95 Update Version InformationThe version numbers of the original retail and OEM release of Windows 95 and the OEM Service Releases are listed below. In general, files included with the indicated release of Windows 95 have the indicated version stamp.
Release Version File dates ---------------------------------------------------------- Windows 95 retail, OEM 4.00.950 7/11/95 Windows 95 retail SP1 4.00.950 0A 7/11/95 OEM Service Release 1 4.00.950A 12/31/95 OEM Service Release 2 4.00.1111* 8/24/96 OEM Service Release 2.1 4.03.1212-1214* 8/24/96-8/27/97 OEM Service Release 2.5 4.03.1214* 8/24/96-11/18/97
With few exceptions, Windows 95 updates are stamped with a version number of 4.00.951 or greater, indicating that the file is a newer version than originally included with Windows 95. Updates to Windows 95 OEM Service Release 2 (OSR2) generally have a version of 4.00.1112 or greater.
It is possible that multiple fixes would be applied to the same component. With a few rare exceptions, these fixes are always cumulative. A change implemented in a given version of a particular component is also included in later versions of that component, along with any additional change implemented in the later versions. (For example, version 4.00.952 would contain the change implemented in version 4.00.951, as well as the new change.)
The cumulative nature of these changes, combined with the incremented version numbers, means that, with very few exceptions, there is always one "current" version of a given component, containing all fixes made to that component to date.
Identifying Windows 95 UpdatesNearly all Windows 95 update files can be positively identified by the following two characteristics, which can be viewed on the Version tab of the property sheet for the file:
The Windows 95 Update Information Tool (Qfecheck.exe)The Windows 95 Update Information tool (Qfecheck.exe) is installed with each Windows 95 update. This tool uses information stored in the registry, and version and special build information in the files themselves, to identify installed Windows 95 updates. This tool can be used to identify which Windows 95 updates have been installed on a given computer.
To run the Qfecheck tool, run the Qfecheck.exe file in the Windows folder (or in some rare cases, the Windows\System folder). The tool contains online help.
For additional information about the Windows 95 Update Information tool, click the article number below to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/145990/EN-US/ )Windows 95 Update Information Tool (Qfecheck.exe)
Installing Windows 95 Updates on a Single ComputerTo install a Windows 95 Update on a single computer, run the self- extracting installer. This performs the following actions:
Uninstalling Windows 95 Updates on a Single ComputerIn most cases, Windows 95 updates can be safely and easily uninstalled and replaced with the original versions of the updated components. This is typically facilitated by an .inf file copied to either the Windows\INF\QFE folder (in most cases), or to the Windows folder (for some older installer packages), during installation of the update. This file typically has a name of the form <xxxxx>_UN.INF. This .inf file can be used to uninstall the Windows 95 update by right-clicking the file in Windows Explorer, and then clicking Install.
When a Windows 95 update is uninstalled, you are prompted for the original Windows 95 installation disks or CD-ROM. The original version of the files are copied and overwrite the updated versions. An alternate file location may also be specified at this time. When uninstallation is complete, you typically need to restart the computer for the change to take effect.
Installing Windows 95 Updates Using Server-Based SetupExtracting Package Contents:
Most Windows 95 update installer packages now support command-line switches that allow the contents of the package to be extracted to a specified directory, without launching the INF-driven installation routine. The command to perform this operation would be:
path to update file\update filename.EXE /C /T:destination folder
For example, to extract the contents of XXXXXUPD.EXE, located in C:\DOWNLOAD, to the C:\UPDATE destination folder, the command would be:
C:\DOWNLOAD\XXXXXUPD.EXE /C /T:C:\UPDATE
This functionality is available in Windows 95 update installer packages created after October 1996. If you are not certain whether a particular installer package supports this functionality, run the installer with a "/?" command-line switch. For example, type the following command:
If a window appears listing the available command-line switches for the package, you may use this command to extract the contents of the package to the desired destination folder. If, instead, a window appears prompting you to install the update, the installer package does not support these command-line switches, and the alternate method described below must be used to extract the contents of the package.
Referring to the steps above for installing onto a single computer, note that the files used in the installation are located in a temporary folder until you click OK in the final prompt window. During this time, the files can be copied into a different folder and saved for further use. Depending on the specific Windows 95 update being installed, this temporary folder may be one of the following folders:
If Windows 95 workstations are being set up from a network share, the updated component files can be copied into the appropriate folder(s) on the network share before installing Windows 95 from this share. In this way, new workstations can be configured with the updated components from the very beginning.
The appropriate folder into which to copy the updated component files depends upon the type of installation.
To install Windows 95 updates on existing Windows 95 workstations that are running a shared installation of Windows 95 from a server, it is normally sufficient to update the component files in the shared folder. In very rare cases, updates to real-mode components will require the files to be copied to the individual computers, either on the server or on the workstation's local hard disk or boot floppy disk.
To install Windows 95 updates on existing Windows 95 workstations that are running local, standalone installations of Windows 95, one of the following methods can be used:
NOTE: When the self-extracting installer is used to install the Windows 95 update, a check is made to ensure that a newer version of the component is not inadvertently overwritten with the version being installed. If an alternate installation method is used, care must be taken to prevent replacing a newer component with an older one. In some cases, replacing a newer component with an older one could render the computer unable to boot.
Obtaining Windows 95 UpdatesCategorized by availability and distribution methods, Windows 95 updates fall into two primary categories: those available publicly from online sources, and those not available publicly, but only available by contacting Microsoft Technical Support. Publicly-distributed Windows 95 updates are available to be downloaded from the Microsoft Download Center. For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:
119591Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.
(http://support.microsoft.com/kb/119591/EN-US/ )How to Obtain Microsoft Support Files from Online Services
To determine which file to download, query the Microsoft Knowledge Base to find the article that references the issue. Specific instructions are included in each article.
Windows 95 updates that are not publicly distributed can be obtained by contacting Microsoft Technical Support, through any of our direct support offerings, including telephone. Note that server-based Setup (using Netsetup) of Windows 95 OEM Service release 2 and 2.1 (OSR2) is not supported. OSR2 was designed to be preinstalled on new computers by computer manufacturers. One of the main components, the FAT32 file system, requires that the computer's hard disk be repartitioned. For this reason, OSR2 is not distributed to resellers.
Attempts to distribute OSR2 using Netsetup result in users being prompted for a Product ID number. This number is usually listed on the Microsoft Certificate of Authenticity. Modifying the Msbatch.inf file does not prevent this prompt.
Knowledge Base Query TipsInformation about specific Windows 95 updates and issues resolved by these updates can be found in the Microsoft Knowledge Base by querying on the issue's symptoms.
Article ID: 161020 - Last Review: November 15, 2006 - Revision: 3.1
Retired KB Content Disclaimer
This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.