Net Framework 2.0 Sp1 Setup Error
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setup can fail and corrupt the .NET Framework 2.0 ★★★★★★★★★★★★★★★ Aaron StebnerApril 21, 200810 Share 0 0 Last week, I started getting a larger than normal volume of emails from https://blogs.msdn.microsoft.com/astebner/2008/04/21/possible-issue-where-net-framework-2-0-sp1-setup-can-fail-and-corrupt-the-net-framework-2-0/ customers who ran into problems using applications that require the .NET Framework 2.0 and needed advice about how to get their systems back up and running. After investigating some of these cases and talking to some folks on the .NET Framework technical support team and Heath Stewart, I learned more about what was causing many of these issues. Heath wrote up an in-depth summary of this issue and net framework posted a tool to help repair systems that get into this state in this post on his blog. I want to also briefly summarize the issue here and link to his blog in the hopes of making it easier to find in the future. Description of the issue Most of the customers I had talked to had the original version of the .NET Framework 2.0 on their net framework 2.0 system and then attempted to install the .NET Framework 2.0 SP1 (either by directly downloading it or by having it offered to them on Windows Update). However, the .NET Framework 2.0 SP1 setup failed due to an error encountered while uninstalling the original version of the .NET Framework 2.0. Note - behind the scenes, the .NET Framework 2.0 SP1 attempts to do a major upgrade of the original version of the .NET Framework 2.0. Unfortunately, there are some issues in the uninstall rollback logic for the .NET Framework 2.0 that cause assemblies to not be put back into the global assembly cache (GAC) if .NET Framework 2.0 uninstall fails. That can leave systems in a state where the .NET Framework 2.0 is partially installed and applications that require the .NET Framework 2.0 will not run correctly. To complicate matters, on a system in this state, the .NET Framework 2.0 cannot be repaired or uninstalled and the .NET Framework 2.0 SP1 cannot be installed. How to diagnose the issue Systems that encounter this issue will have the following information in the .NET Framework 2.0 SP1 setup wrapper log file (named %temp%\dd_dotNETFX20error.txt): [03/25/08,11:11:11] Microsoft .NET Framework 2.0a: [2] Error: Installation failed for compon