Excel won't open file due to file format or file extension is not
https://answers.microsoft.com:443/en-us/msoffice/forum/all/excel-wont-open-file-due-to-file-format-or-file/2e4eec5b-793a-4022-980b-b58845f935eb
WEBOct 10, 2023 · 1. Run the Excel desktop app. 2. Click File > Open, choose "This PC", select the path and the File Explorer will pop on. 3. Go the related location and select the workbook. Click the down arrow beside the Open button and choose "Open and Repair ". For "My colleagues can open their downloads just fine.
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