The Windows "Open With" dialog box will help you quickly reassign a default program for your Excel documents.

How to Open Excel 2007 Files As Separate Windows. If you work with multiple Excel files over the course of a workday, and especially if you use a dual-monitor setup, you might wonder how you can ...

There are a couple of ways to have Excel open most conveniently for you.

An open-source Java project has opened up to Excel. Now developers using the Mondrian OLAP can apply the Microsoft app and receive support options under the project’s new spreadsheet services.

If Microsoft Excel opens a Blank screen when you open an existing file, then you can stop Excel from opening a Blank workbook or sheet.

Private Sub Worksheet_SelectionChange (ByVal Target As Range) If Target.Column = 4 Then Shell "C Program Files (x86)\Putty\putty.exe " & ActiveSheet.Cells (Target.Row, 2) End If End Sub ...

If Word or Excel hyperlinks are slow to open, under usual circumstances or when they point to Microsoft AD FS Server, see this post.