Offline installer for .Net 3.5 SP1 not working

Question

I downloaded a big file of .Net 3.5 SP1.

Now when I try to install it on Windows Server 2012, I get the following screenshot:

Answer 1

You could easily do this. We made it for ourselves if we need it in future.

STEPS:

• Create a bat file

• Copy this text into the bat file and save it:

  @echo To install .NET 3.5 SP1 you need to find the Windows 8.1 DVD Installer or the ISO file.
  @echo Please follow the steps below:
  @echo 1. Insert the DVD Installer or mount the ISO file."
  @echo 2. Open MyComputer and find out the drive letter of the DVD ROM that you just inserted DVD Disk or mounted ISO file."
  @echo off
  set /p DriveLetter="Please enter the letter of your DVD ROM: "
  
  Dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:%DriveLetter%:\sources\sxs /LimitAccess
  
  @echo off
  set /p DriveLetter="Press Enter to close"
  

• Run the bat file as Administrator by right click and click on Run As Administrator and rest should be self explanatory.