What is a .DIAGCFG File And How To Open It – Microsoft


Have you downloaded a file with .diagcfg extension, but you have never seen this extension before? You most likely know what the file is, but you might be unsure on how to open it. Fear not, in this article we will show you how to easily open the .diagcfg file in few simple steps on various systems.

What is a .DIAGCFG file?

The .DIAGCFG file extension comes from Troubleshooting Pack Configuration File. It was developed by Microsoft. The file is a system related files.

What to know

There is currently 1 software that can open the .diagcfg file on 1 platform.

How to open a .DIAGCFG file?

Below we have written a comprehensive guide on how to open the .DIAGCFG file on various operating systems.

How to open a .DIAGCFG file on Windows (7, 8, 10)

Below you can see a visual guide on how to open the .diagcfg file on Windows in 4 easy steps.

1. In the first step you need to download the Microsoft Support Diagnostic Tool software. This software will be used for opening the file.

Step 2

Step 2: Locating your .DIAGCFG file

2. In the second step you need to locate the downloaded file. If you don’t remember where you have downloaded your file to, you should check your /download/ folder as it usually gets automatically saved there.

Step 3

Step 3: Choose “Open with”

3. In the third step right click on your file and choose “Open with”.

Step 4

Step 4: Choose the software and click ok

4. In the fourth step, after clicking “Open with”, you should see the Microsoft Support Diagnostic Tool software that you have downloaded. Choose your software and click on “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .DIAGCFG file?

If you cannot open the .DIAGCFG file, it is entirely possible that you are trying to open the wrong file. The .DIAGCFG file extension is similar to other file extensions such as: .diagpkg – Microsoft, .diagsession – Microsoft, .dib – Microsoft, .dic – Dictionary File, .dic – NEMA. You might be trying to open the wrong file, please recheck if you are trying to open the right file extension again.


In this article you have learned how to open the .DIAGCFG file with the Microsoft Support Diagnostic Tool program on Windows.