---
description: Get knowledgebase articles on our products, including how to use the products, how to order, license information, and so on.
title: Knowledgebase
image: https://www.datanumen.com/wp-content/uploads/2020/03/default-image.jpg
---

 

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[Home](https://www.datanumen.com/) \> Knowledgebase

# Knowledgebase

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![betterdocs-category-icon](https://www.datanumen.com/wp-content/plugins/betterdocs/assets/static/admin/images/betterdocs-cat-icon.svg?v=4.9.1)

## Service

2 

* [Can you repair a file for me? ](https://www.datanumen.com/knowledgebase/can-you-repair-a-file-for-me/)
* [Do you provide data recovery services? ](https://www.datanumen.com/knowledgebase/do-you-provide-data-recovery-services/)

![betterdocs-category-icon](https://www.datanumen.com/wp-content/plugins/betterdocs/assets/static/admin/images/betterdocs-cat-icon.svg?v=4.9.1)

## Misc

2 

* [I have a question/problem regarding one of your blog articles. What to do? ](https://www.datanumen.com/knowledgebase/i-have-a-question-problem-regarding-one-of-your-blog-articles-what-to-do/)
* [Can you add a backlink to my website? ](https://www.datanumen.com/knowledgebase/can-you-add-a-backlink-to-my-website/)

![betterdocs-category-icon](https://www.datanumen.com/wp-content/plugins/betterdocs/assets/static/admin/images/betterdocs-cat-icon.svg?v=4.9.1)

## License

5 

* [Is the license perpetual? ](https://www.datanumen.com/knowledgebase/is-the-license-perpetual/)
* [How many computers can I install your product on? ](https://www.datanumen.com/knowledgebase/how-many-computers-can-i-install-your-product-on/)
* [Can I transfer the license from one computer to another? ](https://www.datanumen.com/knowledgebase/can-i-transfer-the-license-from-one-computer-to-another/)
* [How to deactivate a license? ](https://www.datanumen.com/knowledgebase/how-to-deactivate-a-license/)
* [How many files can I repair with a license? ](https://www.datanumen.com/knowledgebase/how-many-files-can-i-repair-with-a-license/)

![betterdocs-category-icon](https://www.datanumen.com/wp-content/plugins/betterdocs/assets/static/admin/images/betterdocs-cat-icon.svg?v=4.9.1)

## Order

5 

* [How to order the full version of a product? ](https://www.datanumen.com/knowledgebase/how-to-order-the-full-version-of-a-product/)
* [What happens after I send in the order? ](https://www.datanumen.com/knowledgebase/what-happens-after-i-send-in-the-order/)
* [I am tax-exempt. How to prevent sales tax in my order? ](https://www.datanumen.com/knowledgebase/i-am-tax-exempt-how-to-prevent-sales-tax-in-my-order/)
* [Do you offer educational discount? ](https://www.datanumen.com/knowledgebase/do-you-offer-educational-discount/)
* [How to refund my order? ](https://www.datanumen.com/knowledgebase/how-to-refund-my-order/)

![betterdocs-category-icon](https://www.datanumen.com/wp-content/plugins/betterdocs/assets/static/admin/images/betterdocs-cat-icon.svg?v=4.9.1)

## Using Products

43 

* [How to know whether your product can repair/recover my corrupt file? ](https://www.datanumen.com/knowledgebase/how-to-know-whether-your-product-can-repair-recover-my-corrupt-file/)
* [I failed to repair my file with your product, why? ](https://www.datanumen.com/knowledgebase/i-failed-to-repair-my-file-with-your-product-why/)
* [I find a bug of your product. What to do? ](https://www.datanumen.com/knowledgebase/i-find-a-bug-of-your-product-what-to-do/)
* [My file is beyond recovery. What is my last resort? ](https://www.datanumen.com/knowledgebase/my-file-is-beyond-recovery-what-is-my-last-resort/)
* [I want a feature not available in your product. What to do? ](https://www.datanumen.com/knowledgebase/i-want-a-feature-not-available-in-your-product-what-to-do/)
* [DataNumen SQL Recovery](#)  
  * [Can I Recover SQL Server Data from Drive/Disk Directly?](https://www.datanumen.com/knowledgebase/can-i-recover-sql-server-data-from-drive-disk-directly/)
* [DataNumen Zip Repair](#)  
  * [How to repair a split zip file?](https://www.datanumen.com/knowledgebase/how-to-repair-a-split-zip-file/)
  * [How to repair a spanned zip file?](https://www.datanumen.com/knowledgebase/how-to-repair-a-spanned-zip-file/)
  * [The file recovered by DataNumen Zip/RAR Repair is still corrupted. Why?](https://www.datanumen.com/knowledgebase/the-file-recovered-by-datanumen-zip-rar-repair-is-still-corrupted-why/)
* [DataNumen RAR Repair](#)  
  * [What’s the meaning of the recoverable status in the demo report?](https://www.datanumen.com/knowledgebase/whats-the-meaning-of-the-recoverable-status-in-the-demo-report/)
  * [The file recovered by DataNumen Zip/RAR Repair is still corrupted. Why?](https://www.datanumen.com/knowledgebase/the-file-recovered-by-datanumen-zip-rar-repair-is-still-corrupted-why/)
* [DataNumen Outlook Password Recovery](#)  
  * [Why the recovered password is different from the one I set?](https://www.datanumen.com/knowledgebase/why-the-recovered-password-is-different-from-the-one-i-set/)
* [DataNumen DBF Repair](#)  
  * [Why many of the date fields in the repaired database are set to 1900-01-01?](https://www.datanumen.com/knowledgebase/why-many-of-the-date-fields-in-the-repaired-database-are-set-to-1900-01-01/)
  * [Why I still cannot open the fixed DBF file?](https://www.datanumen.com/knowledgebase/why-i-still-cannot-open-the-fixed-dbf-file/)
* [DataNumen Disk Image](#)  
  * [I clone the image of my C: drive. How to restore it?](https://www.datanumen.com/knowledgebase/i-clone-the-image-of-my-c-drive-how-to-restore-it/)
  * [How to mount the image created by DataNumen Disk Image](https://www.datanumen.com/knowledgebase/how-to-mount-the-image-created-by-datanumen-disk-image/)
  * [Can I Clone a Drive with Windows Running on it?](https://www.datanumen.com/knowledgebase/can-i-clone-a-drive-with-windows-running-on-it/)
* [DataNumen Access Repair](#)  
  * [Can I output the fixed database in Access 95/97 format?](https://www.datanumen.com/knowledgebase/can-i-output-the-fixed-database-in-access-95-97-format/)
* [DataNumen Outlook Repair/Exchange Recovery](#)  
  * [I get “Out of memory” error when repairing a PST/OST file. What to do?](https://www.datanumen.com/knowledgebase/i-get-out-of-memory-error-when-repairing-a-pst-ost-file-what-to-do/)
  * [Why I cannot find the wanted emails or other objects in the fixed PST file?](https://www.datanumen.com/knowledgebase/why-i-cannot-find-the-wanted-emails-or-other-objects-in-the-fixed-pst-file/)
  * [There are some unwanted items in the fixed PST file. How to eliminate them?](https://www.datanumen.com/knowledgebase/there-are-some-unwanted-items-in-the-fixed-pst-file-how-to-eliminate-them/)
  * [I format my drive. Can I still recover my Outlook data?](https://www.datanumen.com/knowledgebase/i-format-my-drive-can-i-still-recover-my-outlook-data/)
  * [What is the difference between DataNumen Outlook Repair and DataNumen Outlook Drive Recovery?](https://www.datanumen.com/knowledgebase/what-is-the-difference-between-datanumen-outlook-repair-and-datanumen-outlook-drive-recovery/)

[Explore More](https://www.datanumen.com/knowledgebase-category/products/) 

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### Featured Products

* [DataNumen Outlook Repair](https://www.datanumen.com/outlook-repair/)
* [DataNumen SQL Recovery](https://www.datanumen.com/sql-recovery/)
* [DataNumen Exchange Recovery](https://www.datanumen.com/exchange-recovery/)
* [DataNumen Access Repair](https://www.datanumen.com/access-repair/)
* [DataNumen Excel Repair](https://www.datanumen.com/excel-repair/)
* [DataNumen PDF Repair](https://www.datanumen.com/pdf-repair/)
* [DataNumen Word Repair](https://www.datanumen.com/word-repair/)
* [DataNumen Zip Repair](https://www.datanumen.com/zip-repair/)

### [Latest news](https://www.datanumen.com/news/)

  * [DataNumen Outlook Drive Recovery 10.2 is released on May 9th, 2025](https://www.datanumen.com/outlook-drive-recovery/)
  * [DataNumen Outlook Repair 10.2 is released on April 15th, 2025](https://www.datanumen.com/outlook-repair/)
  * [DataNumen SQL Recovery 7.3 is released on February 19th, 2025](https://www.datanumen.com/sql-recovery/)

[ ](#masthead)

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