Netfx3 Offline Installer

[Nazarena Lugg]

Iam trying to install .net framework 3.5 onto windows server 2019 that is offline. I have downloaded the offline installer dotnetfx35.exe but I get an error when trying to install the exe when double clicking on it. Any advise online says to use the windows ISO but I do not have it. Is there anyway you can use the offline installer of dotnetfx35.exe on windows server 2019?

If I double slick the installer first I need to click "Yes" on the User Account Control dialog box to confirm the installation, but then I get another dialog box with a button that tells me to "Download and install this feature" and it will get the required files from Windows update and complete the installation. I would like to install the required files completely offline. How can I perform an offline installation?

Note that when installing .NET Framework 3.5, they are version specific. You need to install .NET 3.5, which comes with each Windows 10 version. So, for Windows 10 2004, you will need to install .NET 3.5 from that media, 1909 from that media, and so on.

BTW I set up another test box and used the option that appears at the bottom of the same window as the error message (shown in yellow above) and this installed the feature very quickly. Am going to do this to all my servers as a precautionary measure.

if the above method does not work for you. Use add feature via server manager tick to install .net35 framework and on the next page specify the sources\sxs\path which should be you iso dvd. this should work.

In the remote case:

Using dism.exe will access the files under your user credentials.

Using the wizard or install-windowsfeature cmdlet will access the source files under the machine$ account. This is similar to how hyper-V, for example, accesses VHDs on a remote shared storage.

What I find most people miss is that the INSTALL button is available. Most people see the warning and then see the NEXT button disabled and go looking for an answer. @NetoMeter points out the options (e.g. you have no or really slow Internet connection).

Many thanks Daniel. I had similar experience as Sam (March 15th) where nothing worked, even an offline installer. Tried your command line version and this worked a treat. Many hours of head scratching saved !!

Cheers, Alan.

Important!!! during the net 3.5 Installation the Server try to connect to Windows update Server. But if u put Server already into WSUS/OU where WSUS is configured by GPO: Server can not connect to Windows update Server anymore. you will get error message anyway. Solution: put Server to an OU where WSUS is not configured. make gpupdate /force or reboot afterwards. Now Server is aible to get latest net 3.5 files from Internet and Features install will walk through properly

Rather than remove the server from the domain to get it to talk to Windows Update. just change the HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU\UseWUServer to 0, restart the Windows Update service and then try to install it. After installation, change the key back to 1 and restart Windows Update service again.

Thanks for such a DETAILED explanation, dear Mr. Engberg! Nothing else on the Web worked for me. The KEY was YOUR information about the DISM method and requiring the disc with the SAME version of Windows 10 as installed on MY computer.

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The .NET Framework is a crucial software framework that lets Windows run the C, C++, and Visual Basic apps. At present, the latest .NET framework version has been updated to 4.8, but many apps and programs still need the .NET Framework 3.5 version.

Step 1. Click here to open the Microsoft download center, and then go to the Microsoft .NET Framework 3.5 section and click on Download. Then save the downloaded file to your desktop.

Step 3. Select the Download and install this feature link. Then Windows will start downloading the required files. Once complete, you can restart the PC and see if you get the NET 3.5 downloaded and installed.

Microsoft provides an offline installer for .NET Framework 3.5 on its dotnet website. However, you need to select a supported version of the .NET Framework on the download page. Here you should find the NET Framework 3.5 SP1 listed as a supported version, click on it, and follow the on-screen instructions to complete the installation.

This is the Linux app named .Net Framework 3.5 offline Installer whose latest release can be downloaded as NetFramework3.5offlineinstallerWin_10.zip. It can be run online in the free hosting provider OnWorks for workstations.

OnWorks is a free online VPS hosting provider that gives cloud services like free workstations, online AntiVirus, free VPN secure proxies, and free personal and business email. Our free VPS can be based on CentOS, Fedora, Ubuntu and Debian. Some of them are customized to be like Windows online or MacOS online.

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