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  1. 1 Φεβ 2024 · Rename the file extension to match the format of the file, such as .xlsx or .xls: Right-click on the Excel file then go to properties > General tab > Rename the file extension. Repair your Excel file: Repair a corrupted workbook - Microsoft Support. Change Trust Center settings:

  2. 7 Ιουν 2024 · Excel cannot open the file "xxx.xlsx" because the file format or file extension is not valid. Verify that the file has not been corrupted and that the file extension matches the format of the file.

  3. 24 Οκτ 2017 · The error message that you are getting might be caused if the file has been corrupted or the file extension does not the match the format of the file. Let us perform the troubleshooting steps below to help isolate the issue: 1. Change the file extension of your Excel sheet.

  4. 15 Ιαν 2021 · Resetting the Excel file associations will restore Excel to its default settings, undoing any damaging alterations to the program. In most cases, that can help resolve all issues and ensure the program is running smoothly once again.

  5. 21 Οκτ 2022 · How to Fix the “Excel Cannot Open the File Because the File Format or File Extension is Not Valid” Issue? Although the issue can cause quite the panic, the workarounds are actually pretty simple! The solutions include changing the file compatibility to repairing corrupt Excel files.

  6. 25 Μαρ 2020 · Last Updated: March 25, 2020. ISSUE. You may receive an unexpected prompt to Grant Access to files when you try to open a file or do "Save as..." or "Save a copy". When this happens, Excel may become unresponsive and you will need to force quit the application to recover. STATUS: FIXED. This issue has been fixed with version 16.34.

  7. 4 Ιουλ 2020 · The file is not compatible with the Excel-version. The file has become corrupt or damaged. I copied and pasted the file to my desktop, right-click and changed '.xlsx' to '.xls'. Boom!! I got my file back. Try to open your corrupt file in safe mode. Press Windows+R and write excel.exe /safe and click OK. Good Luck. 1 Like. devindaoson1991.

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