First try to rename file. Go to tools, folder options, file types and check have you .xlsx extension. If not then rename the file .xlsx to .xls. Second try to use excel command in file menu – Open and ...

Choose the repair option to fix your corrupted Excel file. 4. Open the Excel file locally. Errors can also occur when an Excel file is stored in OneDrive and not synced locally. To resolve this, save ...

How can I open a .XLSX file without Excel? There are various software alternatives you can use, but if you don’t want to install additional software, you can use third-party viewers or Google Sheets ...

If your Excel files are opening in Notepad on Windows PC, here's how you can reset the settings to make .xls, .xlsx, etc files open in Excel.

If your XLSX file isn’t opening in Excel, you might not have Excel 2007 or a later version, which is needed for XLSX compatibility. Ensure your Microsoft Excel is updated.