2+ How to Install .NET Framework 3.5 on Windows 10 (Offline Installer)
The NET framework is an important component of the Windows operating system that is used to run and support the development of various applications.
On Windows 10, the newer NET framework, which is version 4.5, is already installed. Even so, there are some applications that still require NET framework 3.5.
So when you try to run an application that requires the .NET framework 3.5, you will definitely get a notification window that looks more or less like the image below. And when you try to click Download and install this feature, even got an error notification.
NET Framework 3.5 Error Notifications
NET Framework 3.5 includes the .NET 2.0 and 3.0 versions. When you are opening/installing an application that requires one of the three versions of the NET framework, you just need to install/activate the 3.5 version only.
1. How to Install .NET Framework 3.5 on Windows 10
To install or activate .NET framework 3.5 on Windows 10, the ISO file is required. So first you have to have a Windows 10 ISO file, whether it’s on the installer DVD, flash disk or on your own laptop.
For example, if you don’t have a Windows 10 installer DVD, you can use a bootable flash drive or the easiest way is to directly use the ISO file on your laptop/PC (as in this tutorial). Check out the steps on how to install .NET framework 3.5 below:
1. First, insert the Windows 10 installer media, either in the form of an installer DVD or a bootable flash drive. If you want to use the ISO file directly on your laptop/PC, skip this first step.
2. Mount the Windows ISO file by right-clicking the file, then selecting Mount.
3. In this example, the location of my Windows 10 ISO file is on drive D. So when I mount the ISO file, the drive name will change as I have marked with the arrow. The location of the ISO file that you have mounted is not always on the D drive, so just adjust it.
4. For the record, the file location for activating NET framework 3.5 is located in the folder sources > sxs. So make sure the file named microsoft-windows-netfx3-ondemand-package must be in that folder.
5. After that, open Command Prompt as admin by right click Command Prompt then select Run as administrator.
6. Copy the command below by first replacing X with the location of the drive. For example, the location of the ISO file that I mounted earlier was on drive D, then replace it X with D. Then press Enter.
Dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:X:sourcessxs /LimitAccess
7. Wait for the process for about 3 minutes until the progress reaches 100%.
8. Now if the progress has reached 100% and there is writing The operation completed successfully, it indicates that the NET framework 3.5 has been successfully installed/activated.
2. How to make sure the .NET Framework 3.5 is installed / not yet
To ensure that the NET framework 3.5 is installed, you can follow the steps below:
1. Log in to Control Panel, then select Programs.
2. On the window Programs, choose Turn Windows features on or off.
3. On the window Windows Features, you can see the sign checkbox black in writing .NET Framework 3.5 (includes .NET 2.0 and 3.0) which indicates the .Net Framework feature has been successfully activated.
That’s how to install NET framework 3.5 windows 10 offline. So you only need a windows 10 ISO file to activate it, no need to download it from the internet. Good luck and if you find a problem, you can ask via the comment box below.
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