What to do when MS09.DLL Gets Corrupted in MS Excel

Ms09.dll file is a component of Microsoft Office that enables proper working of Microsoft Office applications and programs. As a component of MS Office, it is included in MS Excel. But,when the file goes missing or damaged, it may cause corruption of any of the Excel workbooks. In such situations, it is required to re-install MS Office to resolve the issue. However, the data present in the corrupted or damaged workbooks can be restored easily by using an updated backup file. If in case, the backup is not available, then you can go for a high-quality excel repair software to retrieve the data completely.

For instance - Sometimes, when you attempt to save or open a file in MS Excel, you may receive any of the following error messages:

"Excel caused an invalid page fault in module MSO9.DLL at memory address."

"C:Program FilesMicrosoft OfficeOfficeEXCEL.EXE
A device attached to the system is not functioning."

"The C:PROGRAM FILESMICROSOFT OFFICEOFFICEMSO9.DLL file appears to be corrupt. Reinstall the file, and then try again."

Cause:

This issue generally occurs when MS09.DLL file is corrupted or damaged.

Resolution:

You can try and resolve the issue by renaming the MS09.DLL file. You can use the following steps to rename the file:

On the Windows start menu, search the file by using Find option.
Type Ms09.dll in the Named box of the Files and Folders option.
When the files is found, rename it with .old extension.

After renaming the file, you can use Add/Remove programs to repair Excel. When you click Add/Remove programs, setup begins and you can click Repair Office to repair all the errors in the Office installation. The process repairs any damaged or missing Excel files.

However, if you still face the problem, and find the excel file damaged, then you can use open and repair option to access the file. But, if it does not solve the problem, then the only way to resolve the problem is to use an advanced excel repair software to repair the corrupted or damage excel file. These tools employ powerful scanning algorithms to repair excel file effectively. Equipped with interactive graphical user interface, these tools are easy to use and understand and you do not require any prior technical skills.