Net Framework 4 has not been installed Fatal error during installation 0x80070643

  • Thread starter Thread starter N. Perry
  • Start date Start date
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N. Perry

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Up until recently (3 days ago), I hadn't even realized that my PC was unable to download an update. Turns out that important update was Microsoft .Net

Framework 4.0, and on shutdown, Windows would configure the update to about 38%, and proceed to shutdown, which was odd, so I decided to manual

install. The first time it gave me this error:


".Net Framework 4 has not been installed because: Fatal error during installation."


At that point, I looked through countless (I mean COUNTLESS) forums, and different step-by-step fixes, and none of them helped the issue. So here I am, asking myself.


Here is the installation log:

OS Version = 6.1.7601, Platform 2, Service Pack 1
OS Description = Windows 7 - x64 Home Premium Edition Service Pack 1

CommandLine = C:\a026a806d29e0a0259\\Setup.exe /x86 /x64
TimeZone = Central Daylight Time
Initial LCID = 1033

Using Simultaneous Download and Install mechanism

Operation: Installing

Package Name = Microsoft .NET Framework 4 Setup
Package Version = 4.0.30319

User Experience Data Collection Policy: AlwaysUploaded

Number of applicable items: 11

Exe (C:\a026a806d29e0a0259\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

ServiceControl operation succeeded!

ServiceControl operation succeeded!

Exe (C:\a026a806d29e0a0259\Windows6.1-KB958488-v6001-x64.msu) failed with 0x240006 - (null).

Exe (C:\a026a806d29e0a0259\SetupUtility.exe) succeeded.
Exe Log File: dd_SetupUtility.txt

MSI (C:\a026a806d29e0a0259\netfx_Core_x64.msi) Installation failed. Msi Log: Microsoft .NET Framework 4 Setup_20150614_202847102-MSI_netfx_Core_x64.msi.txt
Final Result: Installation failed with error code: (0x80070643), "Fatal error during installation. " (Elapsed time: 0 00:00:10).

Please help! Most of my programs need this for some reason.

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