Microsoft Excel is a commercial spreadsheet application written and distributed by Microsoft for Microsoft Windows and Mac OS X. If your question is about programming Excel in VBA then also tag it excel-vba. If it is about an Excel formula or worksheet function, then also tag it worksheet-function.
I've had this problem with Excel 2007 and 2010 on two different PCs, both running Windows 7. My computer has 3 displays, with the center monitor primary. When Excel is open in one of the non-primary ...