Q. When you double-click the icon for a Microsoft Excel file (or right-click the icon, and then click Open), Excel starts but the file does not open as expected. However, you are able to open the workbook when you click Open on the File menu in Excel.
A. 1.Click Start, and then click Run.
(WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk. )
2. In the Open box, type regedit, and then click OK.
3. Locate the following registry key:
4. Right-click the Excel key, and then click Rename.
5. Type OldExcel.
6. On the Registry menu, click Exit to quit Registry Editor.
7. Start Excel, and then quit Excel.
8. Double-click the Excel workbook icon (or right-click the Excel workbook icon, and then click Open) to open the file.
9. In the Open With dialog box, click Microsoft Excel for Windows, and then click OK.