You can actually troubleshoot your Excel problems and error 1002 within the Windows system. To do it, follow the steps below:
- Point your mouse to the Windows Start button and right-click
- In the menu tab, choose Explorer
- Once you get to Explorer, open the directory of C:\Program Files\MSOffice\Office\XLSTART
- Once you open the directory, delete the File named GWXL97.XLA
- Close the Explorer
- Open Excel
- After you open Excel, the program must start and enable you to work without the errors
More information on how to recover Excel file you can find
HERE