The setup program for the. NET Framework 3.5 and the Visual Studio 2008 Express Editions contains logic that will cause it to attempt to connect to the Internet to download files in some scenarios. I’ve heard from several folks who have asked me why this happens and how to prevent it in case they need to install in a fully offline scenario where the system has no Internet connectivity. This post will describe the cases I know of where. NET Framework 3.5 and VS 2008 Express Edition setup will attempt to download files from the Internet and how they can be avoided if necessary. Case 1 – Missing setup packages. NET Framework 3.5 and Visual Studio 2008 Express Edition setup both have logic to search in relative paths next to setup.exe for packages that need to be installed during the setup process. If any of the packages are not found in those relative paths, setup will use URL values constructed from information in the setup data file named baseline.dat to attempt to download the packages from the Internet instead. If setup cannot connect to the Internet or the download fails for any reason, then setup will fail and report an error. In order to avoid requiring Internet access in this scenario, you need to make sure to construct an install point for the. NET Framework 3.5 or the Visual Studio 2008 Express Editions that include all packages that could need to be installed in your environments. You can find more information about how to do this in the following blog posts: If you are interested, you can find more information about how this automatic download functionality works in. NET Framework 3.5 setup here and here. The VS 2008 Express Edition setup packages use the same setup.exe code as the. NET Framework 3.5 setup, so the behind-the-scenes logic is similar for those packages. Case 2 – Installing the. NET Framework 3.5 on a non- English OS The. NET Framework 3.5.
Windows 10 comes with. NET framework 4.5 pre-installed, but many apps developed in Vista and Windows 7 era require the. NET framework v3.5 installed along with 4.5. These apps will not run unless you will install the required version. When you try to run any such app, Windows 10 will prompt you to download and install. NET framework 3.5 from the Internet. However, this will take a lot of time. You can save your time and install. NET Framework 3.5 from the Windows 10 installation media. This method is much faster and does not even require an Internet connection. Here is how to install it. To install. NET Framework 3.5 in Windows 10, do the following: Insert your Windows 10 DVD, or double click its ISO image, or insert your bootable flash drive with Windows 10, depending on what you have. Open ' This PC' in File Explorer and note the drive letter of the installation media you have inserted. In my case it is disk D: Now open an elevated command prompt and type the following command: Dism /online /enable-feature /featurename: Net FX3 / All / Source: D:\sources\sxs / Limit Access Replace D: with your drive letter for Windows 10 installation media. You are done! This will install. NET framework 3.5 in Windows 10. To save your time, I have prepared a simple batch file which will save your time and will find the inserted installation media automatically. It looks like this: @echo off Title. NET Framework 3.5 Offline Installer for % I in ( 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: Net FX3 / All / Source:%setupdrv%\sources\sxs / Limit Access 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.
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