The XLSX file that is corrupt may be restored by making use of the recovery feature of Microsoft Excel. This involves launching Microsoft Excel and then choosing the file from the 'Open' section, clicking on the drop-down arrow next to the Open button and selecting the "Open and Repair" button. The user should attempt to repair the workbook first and if this doesn't work, there is a possibility that Excel will give you the opportunity to restore data from the corrupt file. The user should also consider opening a duplicate of the workbook instead.