What is a .DIAGPKG File And How To Open It – Microsoft (Easy Steps)


Have you came across a file with the .diagpkg extension and you don’t know what it is? It is possible that you know what the file does, but you are unsure on how to open it. In this article we will explain what .diagpkg file extension is, how to open it and how to work with it.

What is a .DIAGPKG file?

The file extension .DIAGPKG is from Troubleshooting Pack File.The developer of this file extension is Microsoft. The file is a system related files.

What to know

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

How to open a .DIAGPKG file?

In this part of the article we will show you how to open the .DIAGPKG file on various operating systems.

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

We have written below an easy-to-understand guide on how to open the .diagpkg file on Windows in 4 easy steps.

1. The first step is to download the Microsoft Support Diagnostic Tool software. You will be using this software in order to open the file.

Step 2

Step 2: Locating your .DIAGPKG file

2. The second step is locating 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. Click on the software and click “OK”. Congratulations! You have opened your file on Windows.

Still cannot open the .DIAGPKG file?

If you are still unable to open the .DIAGPKG file, it might be because you are trying to open the wrong one. There are many similar file extensions that look like the .DIAGPKG file.diagsession – Microsoft, .dib – Microsoft, .dic – Dictionary File, .dic – NEMA, .dicom – 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 .DIAGPKG file with the Microsoft Support Diagnostic Tool program on Windows.