If you don’t have the original file of an image used in a Excel file header or footer and you need it, here is a solution: All Office 2007, 2010… files are actually zipped files. If you have an older version, Excel 97-2003 (.xls), just save it as Excel 2007-2010 workbook (with extension .xlsx). Just renaming does not work. If you open .xlsx file with a program that can open .zip (7Zip, WinRAR or WinZip) you will see some folders. The files you are looking for are in folder “xl\media” and you can easily extract them from there. You may copy the file and work on the copy if you want to be on the safe side.