Windows – Excel 2016 opens a second blank window when opening a file from Explorer with preview pane on

This can occur due to corruption in a personal macro workbook (%appData%\Microsoft\Excel\XLSTART\), and removing PERSONAL.XLSB from this folder caused the problem to go away.

I had to export each of my macro modules to another folder, then after removing PERSONAL.XLSB, record a new macro stored in my "Personal Macro Workbook" (which recreated PERSONAL.XLSB), then on the Developer toolbar, click "Visual Basic" and import the macro modules again.

All the shortcut keys and descriptions were maintained, but more importantly, I didn't get a second copy of Excel opening every time I opened a worksheet from Explorer.

You can do something like this in WinZip.

Open the Zip file, select all the text files, right click and choose "View files with internal viewer".

A new window will popup showing the contents of the text file, and you can use the arrow keys to move between files.