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How to FIX Excel Cannot Open the File Because the File Format or File Extension Is Not Valid
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Excel Cannot Open the File Because the Extension Is Not Valid
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Excel cannot be open the file 'filename.xlsx' because the file format or file extension is not valid - Microsoft Community Hub
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Excel Cannot Open the File Because the Extension Is Not Valid
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Excel File Format or File Extension Is Not Valid: 8 Ways to Fix It - Hongkiat
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excel cannot open the file because the file format or file extension - Microsoft Community
Excel Cannot Open the File Because the Extension Is Not Valid
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