A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Is this an issue in one specific workbook file, one specific worksheet, or does it make no difference?
I'm not sure it will resolve the problem but it's worth a try :-)...
- Go to View> Toolbars> Customize Toolbars & Menus
- On the Toolbars & Menus page click the name of the Worksheet Menu Bar
- Click the Reset button
- Click OK to close the dialog
If that doesn't correct the problem the next test would be to create a new User Account to see if the same behavior occurs when you use Excel while logged in as that user.