.DIAGCAB File Recovery

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .DIAGCAB file recovery guide for Windows, MacOS, Android and IOS in 2023.

DIAGCAB File Recovery

What is a .DIAGCAB file?

A DIAGCAB file is a file used by the Microsoft Support Diagnostic Tool (also referred to as the WTP Wizard), a Windows Troubleshooting Platform (WTP) program used to locate and fix hardware and software problems in Windows. It contains a .CAB file and is used specifically for diagnosing and repairing computer problems.

What Are Common Causes of ".DIAGCAB" Files Lost or Failure?

There can be various causes for ".DIAGCAB" files lost or failure. Some common causes include:

  1. Accidental deletion: Users may accidentally delete the ".DIAGCAB" files while performing file management tasks, such as cleaning up their system or removing unnecessary files.
  2. Software or hardware issues: Issues with the software or hardware components of a system can lead to the loss or failure of ".DIAGCAB" files. This can include software crashes, hardware malfunctions, or compatibility issues.
  3. File system corruption: Corruption in the file system, such as a disk error or bad sectors on the storage device, can result in the loss or failure of ".DIAGCAB" files.
  4. Virus or malware infection: If a system is infected with a virus or malware, it can corrupt or delete ".DIAGCAB" files along with other important files on the system.
  5. Improper file handling: Mishandling of files, such as forceful termination of a program or improper shutdown of the system, can cause ".DIAGCAB" files to become inaccessible or lost.
  6. Software or system updates: Sometimes, during software or system updates, ".DIAGCAB" files may get overwritten, deleted, or become incompatible with the updated software or system, resulting in their loss or failure.
  7. Human error: Human error, such as accidental formatting of the storage device containing ".DIAGCAB" files or mistakenly moving them to an incorrect location, can lead to their loss or failure.
  8. Power outages or system crashes: Power outages or sudden system crashes can interrupt ongoing processes, including the creation, modification, or saving of ".DIAGCAB" files, resulting in their loss or failure.

It is important to regularly back up ".DIAGCAB" files and maintain a reliable data backup strategy to minimize the impact of such issues.

How to recover lost ".DIAGCAB" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".DIAGCAB" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".DIAGCAB" file is always to create it once more.

Use programs for recovering ".DIAGCAB" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".DIAGCAB" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

The tool recovers data from any devices, regardless of the cause of data loss.

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software
  3. Double-click on the disk from which you need to recover ".DIAGCAB" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type
  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored
  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan
  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery
  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".DIAGCAB" extension?

Looking for how to open a stereo troubleshooting Pack Cabinet File image file file?

Programs that open ".DIAGCAB" files

Microsoft Support Diagnostic Tool Microsoft Support Diagnostic Tool
Microsoft Makecab Microsoft Makecab
Microsoft Sign Tool Microsoft Sign Tool

Additional Information

  • File type: Troubleshooting Pack Cabinet File

  • File extension: .DIAGCAB

  • Developer: Microsoft

  • Category: System Files

  • Format: Binary


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 15:31 #
    Leave a comment if you have any questions about Recovering lost .DIAGCAB files after deleting, cleaning or formatting!
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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What is the file extension .DIAGCAB and what is its purpose?

    The file extension .DIAGCAB refers to a Diagnostic Cabinet file. It is a compressed archive file format used by Microsoft Windows operating system for storing diagnostic logs and troubleshooting information.

    The purpose of .DIAGCAB files is to collect and package diagnostic data related to system errors, crashes, or other issues. These files can be used by support technicians or software developers to analyze and debug problems on a Windows computer. They may contain log files, crash dumps, system configuration data, and other diagnostic information.

    DIAGCAB files are typically generated automatically by Windows when an error or problem occurs. Users can also manually create or extract these files using built-in Windows diagnostic tools or third-party software.

  • How can I open a .DIAGCAB file and what software or tools are required?

    A .DIAGCAB file is a diagnostic cabinet file used by Microsoft Windows to store diagnostic information and troubleshooting tools. To open a .DIAGCAB file, you will need to follow these steps:

    1. Right-click on the .DIAGCAB file and select "Properties."
    2. In the Properties window, click on the "Change" button next to the "Opens with" option.
    3. Choose a program from the list or click "More apps" to find additional software.
    4. If you have a specific program in mind, click "Look for another app on this PC" and browse to the location where the desired software is installed.
    5. Once you have selected a program, click "OK" to save the changes.
    6. Double-click on the .DIAGCAB file, and it should now open with the selected program.

    Some popular software that can open .DIAGCAB files include:

    • Microsoft Windows: The built-in Windows Diagnostic Tool can open .DIAGCAB files. You can access it by typing "Diagnostic Tool" in the Windows search bar or by navigating to Control Panel > Troubleshooting > View all > Windows Diagnostic Tool.
    • Microsoft System Center Configuration Manager: This enterprise-level software can open .DIAGCAB files and is commonly used for managing and troubleshooting Windows systems.
    • Third-party diagnostic tools: There are various third-party diagnostic tools available that can open .DIAGCAB files. Some examples include PC-Doctor, PassMark MemTest86, and Speccy.

    It's worth noting that .DIAGCAB files are typically used by system administrators or advanced users for troubleshooting purposes. If you received a .DIAGCAB file from someone, it's advisable to consult with them or refer to the documentation provided to understand its purpose and the appropriate tool to open it.

  • Are there any specific steps or procedures to follow in order to successfully open and view the contents of a .DIAGCAB file?

    Yes, there are specific steps to follow in order to successfully open and view the contents of a .DIAGCAB file. Here's a general procedure you can follow:

    1. Ensure that you have a compatible software or tool to extract the contents of the .DIAGCAB file. One popular tool is 7-Zip, which is a free and open-source file archiver.
    2. Download and install 7-Zip from the official website (https://www.7-zip.org/) if you don't have it already.
    3. Right-click on the .DIAGCAB file and select "7-Zip" from the context menu.
    4. Choose the "Extract to" option to extract the contents of the .DIAGCAB file to a specified folder.
    5. Once the extraction is complete, navigate to the folder where the contents were extracted.
    6. You should now be able to view the extracted files and folders. Depending on the specific .DIAGCAB file, the contents could include diagnostic information, logs, or other related files.

    Note: If you encounter any issues or errors during the extraction process, it's possible that the .DIAGCAB file is corrupt or not meant to be extracted manually. In such cases, it's recommended to consult the documentation or support resources related to the file or software associated with the .DIAGCAB file.

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