How to locate and eliminate links to external sources referenced by worksheet Office 2010

Upon opening after "Enable" is selected the workbook attempts to locate several nonexistent pieces of data, either internet based files or network based files. Requested data appears to be about 11 years old and would not be applicable it located.

Edit Links shows the location of the requested files, i.e., E:\filename but does not show the location within the document that causes this request. A search for "E:\" does not locate text in any worksheets.

The question is how to delete or turn off this problem which slows opening, saving, and recalculation of a large multiple worksheet workbook.