How To Fix “.Net Framework 3.5 Is Not Installed”

Shawn Tierney

March 26, 2018

If you're seeing a “.Net Framework 3.5 Is Not Installed” error when trying to install Studio 5000, follow these simple steps to get it installed:

Step 01) Start by opening Windows Control Panel:

Step 02) Next open Programs and Features:

Step 03) Then click on Turn Windows features on or off

Step 04) When the popup window loads, find and select .Net Framework 3.5:

Step 05) Next click on OK :

Step 06) If you're prompted to download the files from Windows update do so:

NOTE: If your installation download hangs, check out the offline installer we discuss at the end of this article.

Step 07) And when the download and installation is complete, click on Close:

Step 08) Now you should have no issues installing Studio 5000 due to .Net 3.5:

If you'd like to watch a video of the above procedure, check out Episode 29 of The Automation Minute Season 4, below:

Offline Installer:

If for some reason the files never download, or if your PC is not connected to the internet and/or you don't have access to your Windows 10 Installation DVD, there is another way to install .Net 3.5.

While Microsoft doesn't provide a “true” offline installation file for .NET 3.5 SP1, a kind soul in the community has made one available, and below I'll show you how to download and use it:

Step A) Start by downloading the .Net Framework 3.5 offline Installer from https://sourceforge.net/projects/framework-3-offline/

Step B) Then unzip the download, open the folder, and run the utility. When the installer appears, just click on “Start Installation”:

Note: To monitor the progress of the install, open the .txt file in the program's folder (to refresh the progress, close and reopen the text file.)

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Until next time, Peace ✌️

Shawn M Tierney
Technology Enthusiast & Content Creator

Have a question? Join my community of automation professionals and take part in the discussion! You'll also find my PLC, HMI, and SCADA courses at TheAutomationSchool.com.

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Shawn Tierney

Shawn is a lifelong Technology Enthusiast who as a pre-teen in the early 80's discovered his passion for programing on the newly released Apple II and VIC-20 computers. After earning a degree in Electronics, Shawn worked as a Certified Automation Specialist for 25 years before leaving to focus full time on teaching online PLC, HMI, and SCADA courses at The Automation School, as well as publishing industrial automation news, interviews, and how-to articles & videos at The Automation Blog.