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MSO9.DLL Corrupt in Microsoft Excel   Popular

Added: 08/24/2009, Hits: 4,905, Rating: 4, Comments: 1, Votes: 1
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MSO9.DLL is a core file included in Microsoft Office installation. The file plays a vital role in functioning of Microsoft Office applications including Microsoft Excel. If the file goes missing or gets damaged that might introduce corruption errors in workbooks. However, to solve the existing issue, you might opt for reinstalling Office. The damaged workbooks in this way should be restored from backup. If no valid backup exists, you should repair your file by using powerful Excel Recovery tools.

As an instance, when you try to save or open a workbook in Microsoft Excel, you might fail to do so with the following error on screen:

“The C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\MSO9.DLL file appears to be corrupt. Reinstall the file, and then try again.”


“The C:\PROGRAM FILES\MICROSOFT OFFICE\OFFICE\MSO9.DLL file appears to be corrupt. Reinstall the file, and then try again.”

You receive the similar error messages or an error suggesting that an invalid page fault has occurred in MSO9.DLL file.


As the error messages suggest, Microsoft Excel fails to save the file if MSO9.DLL file is damaged or corrupted.


To resolve the issues like above, you should follow these measures:

First, rename the damaged MSO9.DLL file. To do so, search the file by using Find option of Windows start menu. Type in the name of file in the Search for files for folders named box of Files and Folders option. When found, rename the file with .old extension.
Next, use Windows Add/Remove programs option in order to repair Microsoft Excel installation. The process repairs corrupted or missing Excel files, if any. After the Setup begins when you click Add/Remove option, it gives you an option to repair the installation.

After applying the above measures if you find Excel workbooks damaged and inaccessible, try opening them with 'Open and Repair' feature. If you fail to do so, repair them using advanced excel repair applications. These are powerful products that can scan the damaged Excel workbook and restore them with original text and formatting. Excel Recovery tools are comprehensive products that can be used in each case of workbook corruption.

Stellar Phoenix Excel Recovery is an advanced solution to repair damaged Microsoft Excel files. It supports repair excel for Excel 2007, 2003, 2002, and 2000. It can restore all file objects, such as hyperlinks, formulas, charts, pivot tables, macros etc. This read-only software is compatible with Windows Vista, XP, 2003, 2000, and NT.

Comments (1)

Review By: Matthewrobbin [08/05/2016]
Review Text: Best utility to resolve all the corruption issues of .XLS/.XLSX files and recover everything like chartsheets, charts, worksheets, cell comments, and other data in MS Excel new black file.See full details at:

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