Windows 10 comes with .NET framework 4.5 pre-installed, but many apps developed in Vista and Windows 7 are 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.

Steps

1. To start, you need the installation media of Windows 10. It can be the ISO you downloaded, a DVD, a USB, whatever you have.
2. Insert your Windows 10 DVD or USB, or double click on it’s ISO file to mount it.
3. Download the batch file: Download the file, extract it from the ZIP archive to the Desktop, right click it and choose Run as administrator. The file will install .NET Framework 3.5 automatically after finding the drive letter of your Windows 10 installation media.

Click here to download the batch file

Then the installation will start immediately!

Source: https://winaero.com/