.DIAGCAB File Extension

File Type:
Troubleshooting Pack Cabinet File

Having trouble opening .diagcab extension? Don't panic! This page explains what diagcab files are as well as suggests programs you may use to open diagcab files. You can download these programs through this page.

What is a DIAGCAB file?

Diagcab file extension has Troubleshooting Pack Cabinet file type, developed by Microsoft, which is associated with the "system files" category.

Microsoft Support Diagnostic Tool is a troubleshooting program designed to find and fix software as well as hardware issues in Windows operating systems. It uses files with this extension, which store a .CAB files and are used for scanning and repairing computer problems. DIAGCAB files were introduced in Windows Vista. This means that earlier versions of this operating system won’t be able to recognize files with this extension.  

To learn how you can open the given file, read the information below.

diagcab file icon
File Type:
Troubleshooting Pack Cabinet File
System Files

How to open DIAGCAB file?

Double click the diagcab file to open it. The file will open automatically if file associations have been correctly installed and there is a proper program on your computer; if not, file associations may be corrupted and your OS either cannot find the proper program, or you might not have one for opening the file. First, we recommend downloading our utility to fix file association errors; then, you can download any program for opening the .diagcab extension from the ones suggested below. If you are certain there is nothing wrong with the file associations, you may proceed to method 2 right away; besides, if you can't make up your mind when choosing the right program, use Universal File Viewer from the last method.

Method 1: Fix file association errors

Follow these steps in order to automatically fix the diagcab extension associations' problem in no time:

  • Step 1: Click on "Download Solution" to download automatic tool provided by WikiExt.
  • Step 2: Click "Start Scan" to identify all potential issues.
  • Step 3: Review scan results and click "Fix Items".

File Size: 3.04 MB, Download time: < 1 min. on DSL/ADSL/Cable

This Tool is Compatible With: Windows XP, Vista, 7, 8/8.1, 10

Method 2: Download the appropriate software

The given list provides programs which may be used for opening or converting the diagcab file. Choose the proper program for your OS, and click it to start the download or proceed to the developer's website.

Programs that open DIAGCAB files

Method 3: Use universal file viewer

In addition to the list of programs above, we recommend using Universal File Viewer. This tool can open over 250 file extensions and, most likely, it will be able to open the diagcab file as well. Download Universal File Viewer for your OS.

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