Repair Corrupted Excel File -- 2

I have an Excel workbook that suddenly refuses to open and throws a “file corrupt” message every time. There was no crash or recent update before this happened—it just stopped working.

All I need is the working file back, with every sheet, formula, and piece of data retrievable in its original layout. If any section is beyond repair, let me know exactly what can’t be recovered.

Please use whatever method you trust—Excel’s native tools, VBA routines, or third-party recovery software—and share a brief note on what you did so I can avoid the issue in the future.

A quick turnaround is ideal, so include your timeframe and any initial questions when you respond.