.NET Framework 3.5 installation error: 0x800F0950

Anonymous
2017-12-14T20:14:23+00:00

Hello, I get this error: .NET Framework 3.5 installation error: 0x800F0950

I'm running an HP, Windows 10 home.. Okey i had this situation.. At the beginning i tried to reset my windows cause i wanted to, It didn't work so i installed a new windows 10 home, Then after i while i noticed that every wasn't running correctly, Then after i while i wanted to download .NET Framework 3.5, But that i got this error above, Someone help me please, In need !

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Anonymous
2017-12-14T20:18:23+00:00

Open Notepad then copy in this code

@echo off

Title .NET Framework 3.5 Offline Installer

for %%I in (D E F G H I J K L M N O P Q R S T U V W X Y Z) do if exist "%%I:\sources\install.wim" set setupdrv=%%I

if defined setupdrv (

echo Found drive %setupdrv%

echo Installing .NET Framework 3.5...

Dism /online /enable-feature /featurename:NetFX3 /All /Source:%setupdrv%:\sources\sxs /LimitAccess

echo.

echo .NET Framework 3.5 should be installed

echo.

) else (

echo No installation media found!

echo Insert DVD or USB flash drive and run this file once again.

echo.

)

pause

Save the file as netfx.cmd

Right click it and choose Run as administrator.

The file will install .NET Framework 3.5 automatically after finding the drive letter of your Windows 10 installation media.

If media not found insert Win10 Usb or Dvd drive and run as administrator again.

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Anonymous
2018-09-17T17:26:57+00:00

Hi,

This worked for me... You need to put Installation Media in your DVD drive, Flash Drive or elsewhere... I used a Flash Drive...

Enter this into Command Prompt (Admin) or PowerShell (Admin)…

Dism /online /enable-

feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess

Change D: to drive letter the installation media is on...

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  1. Anonymous
    2018-09-17T16:51:26+00:00

    FOLLOWUP: 

    I created a USB installation media on my Surface Pro 4 as per this webpage:

    https://www.microsoft.com/en-us/software-download/windows10

    I left the USB flash drive in the Surface Pro 4 and ran your script as Administrator.  It still says that "No installation media found!"

    I can't believe it's so tough to install .NET Framework 3.5 on what is essentially a new Surface Pro 4.  All conventional attempts to install it, I.e. through Windows Features, gave me error 0x800F0950.  Windows 10 has all the latest updates (I ran Update 3 times prior to this and no updates were available).  Please help!

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  3. Anonymous
    2018-09-17T01:57:39+00:00

    Hi,

    I'm having the same exact problem.  I am using a Surface Pro 4 running all the latest updates.  I tried running your script, but as you have stated, it asks me for a Win 10 USB or DVD.  Where would I get those?  Windows was preinstalled on the Surface and it did not come with any DVD.   Thanks for your help.

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