How to Offline Install .NET Framework 3.5 in Windows 11 with DISM

This post will show you how to install .NET Framework 3.5 in Windows 11 offline from an installation media with DISM. By default, Windows 11 only includes .NET Framework 4.8. However, there are still a huge number of useful apps built against the .NET framework v3.5.

Fix .NET Framework install error 0x800736b3 14003

In Windows 10, a number of users are trying to install .NET Framework 3.5 and facing an issue. While installing .NET 3.5 using DISM, it produces an error 14003 and gives some Microsoft-Windows-NetFx3-OnDemand-Package error 0x800736b3. Here is what you can do to avoid it.

Offline install of .NET Framework 3.5 in Windows 10 using DISM

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.