How to install and update the .NET Framework 1.1 on different operating systems

This article describes the two types of .NET Framework 1.1 packages and the type of package that you should use to install or update your computer. The following two variants of .NET Framework 1.1 packages exist:

• Optional Component Manager (OCM) installation and update packages
• Microsoft Windows Installer (MSI) installation and update packages

OCM installation packages are installed automatically when the operating system is installed. MSI installation packages are installed separately. Typically, MSI installation packages are installed by downloading the MSI package from the Microsoft Update Web site.

You cannot install a .NET Framework 1.1 MSI package on a computer that has the OCM version of the .NET Framework 1.1 installed. The reverse is also true. You cannot install an OCM package on a computer that has the MSI version of the .NET Framework 1.1 installed. Therefore, when you install or update the .NET Framework 1.1, you must make sure that you download and install the correct package type.

Typically, .NET Framework 1.1 OCM update packages include the operating system name in the update name. For example, "Update for Windows Server 2003" is an OCM update package for Microsoft Windows Server 2003 (32-bit). However, .NET Framework 1.1 MSI update packages typically include the .NET Framework version number in the update name. For example, "Update for .NET Framework 1.1" is an MSI update package that applies to several operating systems.

You can use the .NET Framework 1.1 language packs with the OCM and MSI installation packages. You can also use the .NET Framework 1.1 Software Development Kit (SDK) with the OCM and MSI installation packages.

The following sections specify the .NET Framework 1.1 package type that is supported on each operating system.

.NET Framework 1.1 OCM supported operating systems

The following operating systems use the OCM package type:

• Windows Server 2003 (32-bit x86)
  • Windows Server 2003, Standard Edition (32-bit x86)
  • Windows Server 2003, Enterprise Edition (32-bit x86)
  • Windows Server 2003, Datacenter Edition (32-bit x86)
  • Windows Server 2003, Web Edition

Note If you try to install a .NET Framework 1.1 MSI package on a Windows Server 2003 32-bit x86 Edition-based computer, you receive the following error message:

.NET Framework 1.1 MSI supported operating systems

Use the MSI package type to install or update the .NET Framework 1.1 on the following operating systems:

• Microsoft Windows 98 Second Edition
• Microsoft Windows Millennium Edition
• Microsoft Windows NT 4.0
  • Windows NT Workstation 4.0
  • Windows NT Server 4.0
• Microsoft Windows 2000
  • Windows 2000 Professional
  • Windows 2000 Server
  • Windows 2000 Advanced Server
• Microsoft Windows XP (32-bit x86)
  • Windows XP Home Edition
  • Windows XP Professional (32-bit x86)
  • Windows XP Tablet PC Edition
  • Windows XP Media Center Edition
  Note If you try to install a .NET Framework 1.1 OCM package on a Windows 2000-based computer or on a Windows XP (32-bit x86)-based computer, you receive the following error message:
  The version of Windows you have installed does not match the update you are trying to install.
• Windows XP x64 editions
  • Professional x64 Edition
  Note The .NET Framework 1.1 is not supported on Windows XP 64-Bit Edition 2003-based computers.
• Windows Server 2003 x64 editions
  • Windows Server 2003 x64 Standard Edition
  • Windows Server 2003 x64 Enterprise Edition
  • Windows Server 2003 x64 Datacenter Edition
  Note If you try to install a .NET Framework 1.1 OCM update package on an Itanium-based computer or on a computer that is running an x64 version of Windows, you receive the following error message :
  This KBIncidentNumber is for a different hardware platform.
  Note IncidentNumber represents the KB incident number.
• Windows Server 2003 Service Pack 1 for Itanium-based Systems
  • Windows Server 2003 Enterprise Edition for Itanium-based Systems
  • Windows Server 2003 Datacenter Edition for Itanium-based Systems
    
    Note Both of these operating systems must have Windows Server 2003 Service Pack 1 installed before you install the .NET Framework 1.1.

General information about the .NET Framework

For more information about the benefits of the .NET Framework, click the following article number to view the article in the Microsoft Knowledge Base: For frequently asked questions about the Microsoft .NET Framework, visit the following Microsoft Developer Network (MSDN) Web site:For general information about the Microsoft .NET Framework, visit the following MSDN Web site:

Installation information about the .NET Framework

For more information about the differences between OCM and MSI packages for the .NET Framework, visit the following Microsoft Web site: For more information about how to troubleshoot .NET Framework 1.1 installation issues on Microsoft Windows Server 2003, click the following article number to view the article in the Microsoft Knowledge Base: For more information about how to troubleshoot .NET Framework 1.1 installation issues on other operating systems, click the following article number to view the article in the Microsoft Knowledge Base:

Information about 64-bit and Itanium-based computers and the .NET Framework

For more information about the .NET Framework and 64-bit computers, click the following article number to view the article in the Microsoft Knowledge Base: For more information about performance and scalability for Itanium-based computers on the .NET Framework, visit the following Microsoft Web site: For more information about an IIS compatibility issue with ASP.NET 1.1 on 64-bit computers, click the following article numbers to view the articles in the Microsoft Knowledge Base: