Windows 10: .NET Framework 3.5 simply WILL NOT install!

I have an app that needs .NET Framework 3.5 and despite using every available method known to man, it simply WILL NOT install on my very up-to-date Windows 10 system. Windows 10 Pro v 2004 build 19033.1 as at 6 August 2020


Every method of installation fails with the error code 0x800F0950


-From Add features in Control panel: Let Windows Update download the files for you - "The changes couldn't be completed" error code 0x800F0950

-Have tried DISM /Online /Enable-Feature /FeatureName:NetFx3 /All -DISM failed. No operation was performed.Error: 0x800f0950

-Have enabled 'Specify settings for optional component installation and component repair'in Gpedit.msc - made no difference.

-Have tried DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs - it returns the error 'The source files could not be found.' No matter what source medium I use USB flashdrive, copying /sources directly to hard drive, etc I can SEE the sourcefiles listed as microsoft-windows-netfx3-ondemand-package~31bf3856ad364e35~amd64~~ and Microsoft-Windows-NetFx3-OnDemand-Package~31bf3856ad364e35~amd64~en-GB~both with a .cab extension.


I am at my wits end. I really cannot understand why this should be so extremely difficult to achieve. Would be really grateful if anybody had a REAL solution to this persistent issue.

:)

 

Microsoft .NET Framework, Unhandled exception

Hi,

Welcome to Microsoft Community.

I suggest you to un-check and recheck .Net framework 3.5 and .Net framework 4.6 advance series from Windows features.

Try the following steps:

• Press Windows + R keys to open Run command.
• Type Appwiz.cpl and select "turn Windows feature on or off" from the left
• Uncheck .Net framework 3.5 and .Net framework 4.6 advance series.
• Restart the computer
• Repeat step 1 and 2 and check .Net framework 3.5 and .Net framework 4.6 advance series.
• Restart the computer.

Regards,

 

Microsoft .NET Framework, Unhandled exception

no, problem is still actual for me.

have MSI Notebook, problem is

System.MissingFieldException: Field not found: 'WPFOSD.GraphicsSwitchWnd.VGAType'.

at MSI.SCM.SCMII.WMIEventMath(Int32 WMIEvent), after i make something by S-BAR buttons like adding volume or something like that.

 

net framework 3.5

Hello,

Try the DISM method to enable .NET Framework 3.5 on your system.

Please refer following step-by-step guide:

[How To] Enable .NET Framework 3.5 On Windows 10

Let us know if this helps!

Note: Included link in this reply refers to blog post by a trusted Microsoft MVP.