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Solved: .NET Framework Update and Install Fails

Discussion in 'Windows 7' started by BML, Oct 8, 2014.

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  1. BML

    BML Thread Starter

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    My windows 7 system had .Net Framework v. 4.5.1 installed and windows update notified me of a security update. Every time I try to install it, it fails with an error code 643. I did some googling and found a couple of things, including a Microsoft Fix-It (that didn't work) and a .NET Repair tool (that didn't work). So I went and uninstalled it completely. Then windows update shows an update available of course, the .NET 4.5.1 so I re-installed and it failed the install. When I re-boot I get an error saying I need to install .NET 4.0.30319.

    what's going on? Why does it keep failing the install?
     
  2. flavallee

    flavallee Trusted Advisor

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    Microsoft .NET Framework 4.5.2 is the most current version for Windows 7.

    Download and save the full 66.8 MB file, then close all open windows first, then install it.

    ---------------------------------------------------------
     
  3. BML

    BML Thread Starter

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    I just tried it. It failed just like the others did. I zipped and attached the error log.
     

    Attached Files:

  4. BML

    BML Thread Starter

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    Any ideas? Anybody? Could it possibly be because I do not have .Net 3 or .Net 2 installed? According to my program list I only have .Net 1.1. I tried to install both 4.0 and 4.5.2 and they fail with a fatal error. I'm wondering if they require the previous version.
     
  5. flavallee

    flavallee Trusted Advisor

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    Microsoft .NET Framework 3.5 SP1 comes as part of Windows 7.

    3.5 SP1 also contains versions 2.0 SP2 and 3.0 SP2.

    None of those 3 versions will appear in the "Programs And Features" list.

    --------------------------------------------------------
     
  6. plodr

    plodr

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    Go here and download and install the .NET verifier tool
    http://blogs.msdn.com/b/astebner/archive/2008/10/13/8999004.aspx

    You should have .NET 3.5 because it is part of Windows 7.

    .NET 4 and 4.5 can't co-exist. (Another ridiculous MS maneuver).
    So let's first see what Aaron Stebner's tool says is installed on your computer.

    You can also look in HKLM\Software\Microsoft\NetFramework
    there should be folders for v1.0, 2.0.50727, 3.0 and perhaps 4.0 or 4.1

    4.5 is hiding in HKLM\Software\NetFramework\v4\SKUs
     
  7. BML

    BML Thread Starter

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    That tool verified that versions 1.1SP1, 2.0SP2, 3.0SP2, and 3.5SP1 are installed.

    It says 4.0 Client, 4.0 Full, 4.5, 4.5.1, and 4.5.2 are not installed.

    So, if 4 can't coexist with 4.5 then I should be only having to install 4.5.2 but I can't.
     
  8. flavallee

    flavallee Trusted Advisor

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    When I had version 4.0, the install of 4.5.2 overwrote and replaced it.

    4.0 and 4.5.2 won't both remain.

    -----------------------------------------------------------
     
  9. BML

    BML Thread Starter

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    Ok, now we just have to figure out why none of the "4" versions will install and come back with fatal error or error code 643. I've done it both thru windows update and from downloading the full file from MS.
     
  10. BML

    BML Thread Starter

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    Got it!!!! After doing some googling I found this from someone else: In C:\Windows\Microsoft.NET" there is a directory called "Assembly". It has some version 4 files in it. So I renamed the directory "Assembly2" and then tried the install - and it worked with no errors!

    I went to Microsoft Update to make sure i had all the applicable security updates. It appears to be all good now!

    Hopefully this can help anyone else with the problem, there were quite a number of people in various forums reporting similar issues.
     
  11. flavallee

    flavallee Trusted Advisor

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    :) (y)

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