.NET Framework
Benefits of the Microsoft .NET Framework
http://support.microsoft.com/kb/829019How to determine which versions of the .NET Framework are installed and whether service packs have been applied
http://support.microsoft.com/kb/318785
This article describes how to determine which versions of the Microsoft .NET Framework are installed on your computer.When you try to install an update for the .NET Framework 1.0, 1.1, 2.0, 3.0, or 3.5, you may receive Windows Update error code "0x643" or Windows Installer error code "1603"
http://support.microsoft.com/kb/923100How to repair an existing installation of the .NET Framework
http://support.microsoft.com/kb/306160
You may need to repair your installation of the .NET Framework if you upgrade your operating system or if the current installation of the .NET Framework becomes corrupted. This article describes how to do so.How to troubleshoot Microsoft .NET Framework 1.1 installation issues
http://support.microsoft.com/kb/824643Error message when you try to install the .NET Framework 1.1 Service Pack 1 Update from the Windows Update site on a Windows XP-based computer: "Updates were unable to be successfully installed"
http://support.microsoft.com/kb/922377You may receive an "Error 1935" error message when you use the Netfx.msi Windows Installer package to install the .NET Framework 1.1
http://www.support.microsoft.com/kb/839547Uninstall Cleanup Tool for the .NET Framework 1.0 and ..NET Framework 1.1 updates KB928366, KB929729, and KB928367:
http://www.microsoft.com/downloads/details.aspx?FamilyID=7a4efc33-0343-4ee4-b0c4-97bd16967a09&DisplayLang=enHow to troubleshoot Microsoft .NET Framework 2.0 installation issues
http://support.microsoft.com/kb/908077/The .NET Framework 2.0 SP1 installation fails on a computer that has the .NET Framework 2.0 installed and that is running Windows XP, Windows Server 2003, or Windows 2000:
http://support.microsoft.com/kb/951950Microsoft .NET Framework 2.0 Registration Correction Tool on Windows XP, Windows Server 2003, and Windows 2000:
http://www.microsoft.com/downloads/details.aspx?FamilyID=0ba6038c-061e-4b4a-9be9-96a323701260&DisplayLang=en
On a computer that has Microsoft .NET Framework 2.0 installed, you may receive a an error while installing Microsoft .NET Framework 2.0 Service Pack 1 and the installation may fail.