.NET Framework 3.5 on Windows 10

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I am unable to install the .NET Framework 3.5 on my Windows 10 box. I tried:

  • enabling it through Programs and Features.
  • enabling and installing through DISM.
  • SFC /scannow

No success. Mostly I get error code 0x800736B3 saying, "The referenced assembly is not installed on your system". Sometimes I get Error 14003. I obviously need .NET due to many apps needing it to run. This is a brand new system. What should I try next?

windows-10
.net-framework
asked on Super User Aug 21, 2015 by prl77 • edited Sep 22, 2015 by Gregg Bursey

3 Answers

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Please proceed with caution as your results may vary: Look for .Net Cleanup Utility.

I will be honest, have not used under Windows 10. However, I have had good luck with this application cleaning up old traces of .Net, so you can start afresh with net .Net Install(s).

answered on Super User Aug 21, 2015 by Leptonator
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Did you try with the executable installation file from microsoft?

If the NetFX installation files are not under C:\sources\SxS on your installed system, or under /sources/WinSxS in your installation media, you will need to find and download the microsoft-windows-netfx3-ondemand-package.cab file from Microsoft if you can find it, or from another .iso file which you can downlaod through Media Creation Tool. You can then install it through DISM like this:

DISM.exe /Online /Add-Package /PackagePath:c:\KBnumber.cab

If this doesn't work, some people mention using these 2 commands - although I suspect you shouldn't need them if your Windows is freshly installed:

Dism /Online /Cleanup-Image /StartComponentCleanup
Dism /Online /Cleanup-Image /RestoreHealth
answered on Super User Jan 4, 2021 by GChuf
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Go to Programs and Features in the Control Panel, then click on "Turn Windows features on or off". In the Windows Features dialog, just check the box for .NET Framework 3.5.

answered on Super User Apr 6, 2017 by Charles Burge

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