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Thread: error 80070026 (unknown) when installing .net framework 3.5 sp

  1. #1
    EJ Guest

    error 80070026 (unknown) when installing .net framework 3.5 sp

    I'm running Vista Ultimate on a dell XPS laptop. Most updates are successful.
    I previously had this prblem trying to install Tinker. I got support from
    microsoft, but they couldn't figure out what was wrong. They finally
    suggested reinstalling Vista, but as everything else is working, I chose not
    to do it. I have a similar configuration on my desktop and have no problems.
    So, I am thinking it must be some hardware-related driver.

    Does anyone have any ideas how to resolve this?

  2. #2
    Join Date
    May 2009
    Posts
    1

    Re: error 80070026 (unknown) when installing .net framework 3.5 sp

    I encounter the exactly same problem with a Dell XPS M1330 and Vista. Don't know whether it's important to download this update. All other updates install ok. Any adivce?

  3. #3
    MowGreen Guest

    Re: error 80070026 (unknown) when installing .net framework 3.5 sp

    0x80070026 ERROR_HANDLE_EOF
    Reached the end of the file.

    Suggest you manualy download the full package and *save* it:
    http://download.microsoft.com/downlo...dotnetfx35.exe

    Once the download completes, Clean boot Vista.
    Do "Step 1: Perform a clean boot"
    http://support.microsoft.com/kb/929135

    When the system is clean booted, then attempt to install dotnetfx35.exe
    by *right* clicking it, choose 'Run as administrator', follow the
    prompts to allow it to run.
    Restart the system IF it installs. A successful installation would
    indicate that 3rd party software had previously interfered with the SP's
    installation.
    *REMEMBER* to go back and undo the changes you made in order to Clean boot.


    If it fails to install again, check the installation logs to see where
    it's failing. See the ".NET Framework 3.5 and 3.5 SP1 setup log files"
    section here to find out where they are located on your system:
    http://blogs.msdn.com/astebner/archi...0/8445569.aspx

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