Generally Excel.Exe will be located in C:\Program Files (x86)\Microsoft Office\Office15 in case of Excel 2013 / Windows 7. During installation, if another path is chosen, Excel.Exe's location changes. Default Path is also dependent upon Office and Windows combinations. Sometimes, it may not be locatable at all.

To find the location of Excel.Exe -

1. Start Excel
2. Right click on Windows Task Bar > Start Task Manager > Processes tab (Task Manager can also be opened by pressing CTRL+SHIFT+ESC)
3. Locate Excel.Exe > Right Click > Open File Location to reach to Excel.Exe



VBA Approach - Immediate Window

1. Open any workbook and ALT+F11
2. If Immediate Window is not visible, CTRL+G
3. Put following in Immediate Window and Enter to display the path of Excel.Exe
? Application.Path

VBA Approach - Coding Approach (May be needed to access this location from another application)

1. Open any workbook and ALT+F11
2. Locate your Workbook name in Project Explorer Window
3. Right click on your workbook name > Insert > Module
4. Copy paste the Macro code given (Either of the Macro Code will work)
5. Go back to your Workbook and ALT+F8 to display Macro Window
6. Run your Macro from here