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FIXED: Excel Cannot Open the File Format/File Extension is Not Valid | Excel Tech & Tricks
[5 WAYS]How to repair Corrupted Excel File | Excel Cannot Open Because The File Format Is Not Valid
How To Fix Excel Cannot Open the File Because the File Format or File Extension Is Not Valid
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FIX Excel Cannot Open The File Because The File Format Or File Extension Is Not Valid
excel cannot open the file because the file format or file extension is not valid
Excel cannot open the file because the file format or file extension is not valid
How to Solve Excel Cannot Open the File - Because the File Format or File Extension is Not Valid
Excel Cannot Open File Fix ‘File Format or Extension Not Valid’ Error 5 Easy Fixes
Excel cannot open the file because the file format or file extension is not valid
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Last Updated: August 12, 2026
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