.OCA 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 .OCA file recovery guide for Windows, MacOS, Android and IOS in 2024.

OCA File Recovery

What is a .OCA file?

Accompanying file saved with Visual Basic custom control (.OCX) files; contains standard descriptions of objects, properties, and methods used by OLE Automation; created automatically by Visual Basic and given the same name as the custom control except for the file extension.

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

There are several common causes of ".OCA" files lost or failure:

  1. Accidental deletion: Users may accidentally delete ".OCA" files while organizing or cleaning up their computer systems.
  2. Software or hardware issues: Issues with software or hardware components can lead to the loss or failure of ".OCA" files. This could include software crashes, system errors, or hardware malfunctions.
  3. Virus or malware attacks: Viruses or malware can infect and corrupt ".OCA" files, rendering them inaccessible or unusable.
  4. File system corruption: Corruption of the file system, such as a damaged or fragmented hard drive, can result in the loss or failure of ".OCA" files.
  5. Power outages or improper system shutdown: Power outages or improper shutdowns can interrupt the saving or accessing process of ".OCA" files, leading to their loss or failure.
  6. File system errors: Errors within the file system, such as file system inconsistencies or errors in file allocation tables, can cause ".OCA" files to become lost or fail.
  7. Software conflicts: Conflicts between different software applications can interfere with the proper functioning of ".OCA" files, resulting in their loss or failure.
  8. Human error: Human error, such as accidental overwriting or formatting of storage devices containing ".OCA" files, can lead to their loss or failure.
  9. Physical damage to storage devices: Physical damage to storage devices, such as hard drives or memory cards, can result in the loss or failure of ".OCA" files stored on them.

It is important to regularly backup ".OCA" files to prevent loss or failure and to use reliable data recovery methods in case of any unforeseen issues.

How to recover lost ".OCA" 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 ".OCA" 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 ".OCA" file is always to create it once more.

Use programs for recovering ".OCA" 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 ".OCA" 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 ".OCA" 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 ".OCA" extension?

Looking for how to open a stereo custom Control Library Type File image file file?

Programs that open ".OCA" files

Microsoft Visual Studio Microsoft Visual Studio

Additional Information

  • File type: Custom Control Library Type File

  • File extension: .OCA

  • Developer: Microsoft

  • Category: Developer Files

  • Format: N/A


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 14:25 #
    Leave a comment if you have any questions about Recovering lost .OCA 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 a .OCA file extension and what does it signify?

    The .OCA file extension typically signifies an "OCA Manifest File." OCA stands for "One Click Application," and it is a file format used by Microsoft Office applications.

    An OCA file contains metadata and information about an add-in or extension for Microsoft Office. It is used to register and manage the add-in within the Office application. The OCA file specifies details such as the add-in's name, version, location, dependencies, and other relevant information.

    When an Office application starts, it checks for OCA files associated with installed add-ins. If found, the application loads and activates the add-in based on the information provided in the OCA file.

    Overall, the .OCA file extension signifies a metadata file used by Microsoft Office to manage add-ins and extensions.

  • How can I open a .OCA file and what programs are compatible with it?

    A .OCA file is typically associated with the Microsoft Office Assistant, a digital character that provides help and guidance in Microsoft Office applications. However, opening a .OCA file directly is not possible as it is a compiled file format specific to the Office Assistant.

    To interact with the .OCA file, you need to have the corresponding Microsoft Office application installed, such as Microsoft Word, Excel, or PowerPoint. Here's how you can use the Office Assistant:

    1. Open the respective Microsoft Office application.
    2. Go to the "Help" menu or the "View" tab (depending on the version).
    3. Look for an option related to the Office Assistant, such as "Show Office Assistant" or "Office Assistant Options."
    4. Enable the Office Assistant, and it should appear on your screen.
    5. Interact with the Office Assistant to get help and guidance for using the Office application.

    Please note that the Office Assistant feature was discontinued in newer versions of Microsoft Office (Office 2007 and onwards). Therefore, if you are using a more recent version, you may not find the Office Assistant functionality.

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

    Yes, there are specific steps to follow in order to successfully open and access the contents of a .OCA file. The .OCA file format is used by Microsoft Office to store cached versions of custom controls.

    Here is a step-by-step guide to open and access the contents of a .OCA file:

    1. Ensure that you have the appropriate software installed: You need to have Microsoft Office or Microsoft Visual Basic for Applications (VBA) installed on your computer to open .OCA files.
    2. Locate the .OCA file: Find the .OCA file you want to open on your computer. Typically, .OCA files are located in the "C:WindowsSystem32" or "C:Program FilesCommon FilesMicrosoft Shared" directories.
    3. Open Microsoft Access or Visual Basic for Applications: Launch Microsoft Access or Visual Basic for Applications, depending on the type of .OCA file you have.
    4. Import the .OCA file: In Microsoft Access, go to the "External Data" tab and click on the "Access" button. Then, select the "Import & Link" option and choose the .OCA file you want to open. In Visual Basic for Applications, go to the "Tools" menu, select "References," and click on the "Browse" button to locate and select the .OCA file.
    5. Access the contents: Once you have imported the .OCA file, you can access its contents. The specific steps to access the contents will depend on the software you are using and the purpose of the .OCA file.

    It's important to note that .OCA files are typically used by developers to cache custom controls for faster loading and improved performance. Therefore, the contents of the .OCA file may not be directly accessible or editable by end-users.

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