Cannot unprotect workbook with an Excel crash
 

..I have a new Lenovo T400 with Office 2007. I created an Excel 2007 (.xlsx)
document and then protected the shared workbook using a password on the
review tab. Now when I go to unprotect the shared workbook Excel crashes
each and every time. Any ideas on how I can save myself hours of work by not
having to remake the entire workbook with dozens of worksheets?