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Try uninstalling Office completely, then restart, install Office and patch fully. <br />
<br />
It that fails, make a new, test, Windows User Profile, log into the new Windows Profile and test. <br />
<br />
You can check add-ins for strange add-ins, but with a normal install of Office and add-ins, we do not see this message.
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Try uninstalling Office completely, then restart, install Office and patch fully.

It that fails, make a new, test, Windows User Profile, log into the new Windows Profile and test.

You can check add-ins for strange add-ins, but with a normal install of Office and add-ins, we do not see this message.

pramod1

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It might be that all you need to do is to completely close Excel and/or reboot.
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It might be that all you need to do is to completely close Excel and/or reboot.

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Some corrupted xls file can be view on google spreadsheets or LibreOffice so I think you should try open with these programs.<br />
<br />
If I still can readable, the file damaged completely.
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Some corrupted xls file can be view on google spreadsheets or LibreOffice so I think you should try open with these programs.

If I still can readable, the file damaged completely.

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One user is constantly getting this error when opening excel file <br />
Excel found unreadable content in n excel file<br />
<br />
Do you want to recover the contents of the workbook <br />
<br />
If you trust the source of the workbook click yes<br />
<br />
Excelbrecovered your formulas but some data would be lost<br />
<br />
Is anything needs to look or repair or addins
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One user is constantly getting this error when opening excel file 
Excel found unreadable content in n excel file

Do you want to recover the contents of the workbook 

If you trust the source of the workbook click yes

Excelbrecovered your formulas but some data would be lost

Is anything needs to look or repair or addins

Excel

Microsoft Excel topics include formulas, formatting, VBA macros and user-defined functions, and everything else related to the spreadsheet user interface, including error messages.

Microsoft Excel

Microsoft Office is an integrated suite of applications that includes Outlook, Word, Excel, Access, PowerPoint, Visio and InfoPath, along with a number of tools to assist in making the individual components work together. Coding within and between the projects is done in Visual Basic for Applications, known as VBA.