When a corrupt Excel file either fails to open a workbook or prompts about corruption, its built-in repair option can be tried. How to restore an Excel document that has been damaged? First, open the program and go to File > Open > Browse. Then select the problematic workbook and click the drop-down menu next to Open to select the Open and Repair command. Try Repair first. If it does not work, go to Extract Data to recover the available information from the workbook. Other things you can try include examining the options provided by Excel for restoring the data, like AutoRecover, OneDrive version history or Windows Previous Versions. It is recommended to save your recovered information before you overwrite the damaged file with it. When the file has been made inaccessible due to a storage issue, Notchox software may come in handy.