It sounds like your Excel file may be corrupted, which can happen for a variety of reasons such as a sudden power outage or a virus. Fortunately, there are a few things you can try to repair the file.
- Open Excel in Safe Mode: Try opening Excel in Safe Mode by holding down the Ctrl key while opening Excel. This will disable any add-ins that may be causing issues with your file.
- Use the Open and Repair featu Open Excel and click on File Open. Browse to the location of your file and click on the drop-down arrow next to the Open button. Select Open and Repair and see if Excel can repair the file.
- Use a third-party tool: If the above methods do not work, you can try using a third-party tool such as Stellar Repair for Excel or Kernel for Excel Repair. These tools can repair corrupted Excel files and recover data from them.
- Recover data from a previous version: If you have a previous version of the file that was saved before it became corrupted, you can try recovering data from that version. To do this, right-click on the file and select Properties. Click on the Previous Versions tab and select the version you want to restore.
It's important to note that repairing a corrupted file may not always be successful and you may lose some data. It's always a good idea to regularly backup your important files to prevent data loss.