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Excel file won't open or says it's corrupted

Excel files get corrupted when they're saved badly or there's a problem with cloud sync. Try opening the file through Excel instead of clicking it directly, or use Excel's built-in repair tool. If that doesn't work, look for a backup or auto-save version of the file.

Excel files can get corrupted for a few reasons — the file didn't save properly, someone else edited it at the same time, or cloud sync had a problem. Excel has a repair tool that can fix many of these issues. If that doesn't work, you have a backup version saved automatically that you can use instead.

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