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ron
Asked: 2020-03-04 12:01:34 +0800 CST

offline install.NET 3.5 with Windows 10

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I have a work computer running windows 10, and with the way win10 does everything for you under the hood I would like clarification/help on the following because it seems like I am at a point of this cannot be done and I find it hard to believe.

  • When installing 3rd party software and drivers for test equipment, it prompts saying .NET Framework 3.5 is required cannot continue- retry this install after you have installed .NET 3.5. And in win10 it conveniently pops up saying do you want to download from Microsoft.
  • The location of my win10 pc does not have internet connection and I am for the most part prohibited from an internet connection. I thought an offline install should be possible but...
  • is this correct: https://dotnet.microsoft.com/download/dotnet-framework/net35-sp1 which provides dotnetfx35.exe @ 231MB all that is needed?
  • In running this dotnetfx35.exe it still prompts to "Download & Install".

How does one do an offline install of .NET Framework 3.5?

from https://docs.microsoft.com/en-us/dotnet/framework/install/dotnet-35-windows-10

If you're not relying on Windows Update as the source for installing the .NET Framework 3.5, you must ensure to strictly use sources from the same corresponding Windows operating system version. Using a source path that doesn't correspond to the same version of Windows won't prevent a mismatched version of .NET Framework 3.5 from being installed. However, this will cause the system to be in an unsupported and unserviceable state.

that sounds bad, like I should not be doing an "offline" install?

.net

3 Answers

  1. If you have the install media, you can use powershell to install offline using the Install-WindowsFeature commandlet. Mount the .iso or insert the disc and then open powershell as an admin and run:

    Install-WindowsFeature Net-Framework-Core -source d:\sources\sxs

    where d: is the drive letter for the install media.

    This microsoft article documents the method, though it is using a network share as the source instead of the install media.

    Edit: An alternative method if Install-WindowsFeature is unavailable is Enable-WindowsOptionalFeature. Use the following syntax:

    Enable-WindowsOptionalFeature -FeatureName "NetFx3" -Source d:\sources\sxs

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  2. Fire up an Administrative command prompt (not PowerShell).

    Mount the original installation media.

    DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs

    Where d is the mounted installation media you used to install Windows.

    https://docs.microsoft.com/en-us/windows-hardware/manufacture/desktop/deploy-net-framework-35-by-using-deployment-image-servicing-and-management--dism

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  3. .NET 3.5 is a builtin Windows feature. You need to run Add/Remove Programs, and click on Turn Windows features on or off:

    enter image description here

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