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  1. Can't open XLSX file, extension not valid | Microsoft Community Hub

    Dec 13, 2023 · Can't open XLSX file, extension not valid Hello, I can't open an Excel file that is important to me due to the extension not being valid or corrupted. I've tried about everything that I could find …

  2. Excel files will not open | Microsoft Community Hub

    Oct 29, 2023 · Hello, It seems like Excel is not recognizing the association between .xlsx files and the Microsoft Excel program. This can happen when the file association settings are changed or when …

  3. Excel cannot be open the file 'filename.xlsx' because the file format ...

    Jul 4, 2020 · Hi All, I have a excel.xlsx file saved in my system which has been corrupted .I atleast need to recover the data stores .It is a file of 124 KB and has...

  4. How to unprotect Excel sheet if forgot the password

    Jul 1, 2024 · I deleted the tag entirely, saved, and closed the XML file. After that, I put all the modified files back into the ZIP file and changed the file extension from .zip back to .xlsx. When I opened the …

  5. Open Office spreadsheet | Microsoft Community Hub

    Aug 27, 2022 · MDP2021 Migrating Excel files to OpenOffice, or vice versa, always involves some compatibility problems. In the new version of Openoffice you can open an .xlsx file directly, but if you …

  6. Cannot open Excel files after upgrading to Windows 11

    Oct 21, 2021 · All xlsx files now show with an IE symbol and will try to open in internet explorer (without success of course). The workaround is to right click on the file and select "open with" excel. That is …

  7. file extension is not valid , verify that the file is not corrupted ...

    Jul 16, 2022 · Now, choose the “View” tab and enable “File Name Extension.” After enabling the “File Name Extension,” you can change the extension of any file. Method 2: Open and Repair Method The …

  8. New excel file cannot open because the file format or file extension is ...

    Dec 25, 2023 · I suspect that the template for a new Excel file created via File Explorer is either missing or 0-length, but I have been unable to it. Any suggestions on where to look?

  9. cant open a excel 365 file | Microsoft Community Hub

    Jan 10, 2025 · Here's how they can do it: Open the file in Excel 365. Click on "File" > "Save As". Choose the desired format (e.g., Excel 97-2003 Workbook, .xls) from the "Save as type" dropdown menu. …

  10. unable to open Excel file from Sharepoint | Microsoft Community Hub

    Oct 25, 2023 · Here are some troubleshooting steps for the issue of being unable to open Excel files from SharePoint in Excel desktop: Office Repair: Go to 'Programs and Features' on your PC, select …