How to Remove Excel From Shared Mode

1. Click the Windows Start icon and select 'All Programs.' Click 'Microsoft Office,' then click 'Microsoft Excel.' The spreadsheet software opens.
2. Press the 'Ctrl' and the 'O' keys to open the 'Open' dialog window. Double-click the file you want to edit.
3. Click the 'Review' ribbon tab, then click 'Protect and Share Workbook.' This button opens a sharing configuration window.
4. Remove the check mark next to the 'Allow changes by more than one user at the same time.' Click 'OK' to save the changes.