File Extension Database

Open DIAGCAB File

File extension DIAGCAB used by Microsoft or OEM support to deliver customized installation and test update packages to Microsoft customers. To generate these files OEM vendors or ISVs use WTP or Windows Troubleshooting Platform.

Usually to open DIAGCAB file you will just need to double click on it. Sometimes DIAGCAB file is delivered together with DIAGPKG file so you can try double-clicking on DIAGPKG.

You can run a troubleshooting pack in the Windows PowerShell window. To get the package use the Get-TroubleshootingPack cmdlet. Then pass it to the Invoke-TroubleshootingPack cmdlet. If you run DIAGCAB package in the Windows PowerShell window, the interactions are translated to text prompts.

Typical DIAGCAB application file locations:

C:\Windows\system32\msdt.exe /cab "%1"

Frequently associated Windows objects:

Diagnostic.Cabinet

How Can I Open DIAGCAB File on Windows

We researched and learned that the best way to open DIAGCAB file is to find a DIAGCAB file in question in Windows OS File Explorer and double click on it to launch the corresponding application.
If a DIAGCAB file is not opened in an application and you instead get a "Windows can't open a file" error message you should try looking for an application which can open the file in question.
If you know the application which can open DIAGCAB file then run it and see if there is a File->Open main menu option in the application.
If you don't know the application which function as DIAGCAB file opener then try to search online for "DIAGCAB viewer", "application to open DIAGCAB file" or "open DIAGCAB file" queries in the search engine you like.
Install the application you found and check if it can open DIAGCAB file

How Can I Open DIAGCAB File on Mac OS

We recommend to find a DIAGCAB file in question in Mac OS Finder and double click on it to launch the corresponding application.
If a DIAGCAB file is not opened in a Mac OS application and you instead get a "There is no application set to open the file" error message you can click on "Search App Store" in the error dialog and Mac OS will show you applications compatible with DIAGCAB file.
If you know the Mac OS application which can work as DIAGCAB file opener you can choose the "Choose Application..." option in the error box to associate the file extension and open DIAGCAB file in it.
If you don't know the application which can open DIAGCAB file then try to search for "DIAGCAB viewer", "application to open DIAGCAB file" or "read DIAGCAB file" queries in the online search engine you like.
Install the application you found and check if it can read DIAGCAB file

How Can I Open DIAGCAB File on Android

If you downloaded a DIAGCAB file on Android device you can open it by following steps below:

In the Android apps list on your Android device find "My Files" or "File manager" app and tap to start it.
Tap on "Downloads" folder inside the app.
You should see your downloaded DIAGCAB file in that folder.
Tap on the file. If Android device supports opening the file you downloaded it will open in the corresponding app.
If file does not open you can look for the corresponding app that can open the file by searching Android App Store for the "DIAGCAB".
If you cannot open the file with the apps from Android App Store it is possible that the file could only be opened on desktop platforms such as Windows or Mac OS. Try searching for "DIAGCAB viewer", "DIAGCAB file reader" online and see if any desktop applications can open it.
It is also possible that the file you downloaded is outdated and is no longer supported.

How to Open DIAGCAB File on iPhone or iPad

To open DIAGCAB File on iOS device follow steps below:

We advies to open Files app on your iPhone or iPad device. You can find it by swiping down on the home screen and typing "Files" in the search bar.
Tap on the Downloads folder on the Files app home screen.
You will see all files that you recently downloaded. Tap on the DIAGCAB file to view it.
If you have the right app that can open it it will automatically launch and open your file.
If you don't have the app which can open it you need to serch Apple app store for "DIAGCAB". This way you can find apps which can open DIAGCAB files.
If this doesn't help it is possible that your file could be opened only by the desktop application. To find an app which can open it on desktop look for "DIAGCAB viewer" or "DIAGCAB file" online in your favorite search engine.