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Excel cannot open the file because the format or the extension is not valid

Luis Ernesto Rosas Burgos 0 Reputation points
2025-10-25T22:00:32.6766667+00:00

Excel cannot open the file because the format or the extension is not valid. Check that the file has not been corrupted and that the file's extension and format match.

Microsoft 365 and Office | Excel | For home | Windows
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  1. EmilyS726 171.3K Reputation points Independent Advisor
    2025-10-25T22:34:00.59+00:00

    Hello,

    Is it just one file, or any file?

    Can you locate this file in the File Explorer, right click on it, then choose "copy as path", and the paste it in a comment to me please?

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