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I've got Microsoft office 2016 and am running Windows 7. When opening an excel file so that it is maximized I get a second blank window with the excel icon in the top left corner and only the formula bar in it. It just started doing this and it rather aggravating as when I move the spreadsheet I opened to my other screen the blank one flashes and I can't just close the blank window. If i open the same excel file so that it's not maximized the second window does not open. It's almost like they're the same window and attached to one another. Does anyone know of a fix for this?
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I have found the reason, why it is happening - there is conflict between nview from nvidia and some apps of office365 (excel with second window and outlook with issue of opening some message windows after plug in/off the second monitor/projector).
If you uninstall nview from your comp, the issue with excel will be gone.
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Yes, I get the same issue. I even get the blank window by just opening Excel directly.
I have put info about the issue here: https://excel.uservoice.com/forums/304921-excel-for-windows-desktop-application/suggestions/31956694-bug-second-blank-window-opens-after-minimizing-of
It's still happening and as @Ben Alwag pointed out, you don't even have to open a file and this window appears on minimize. But as @thomaaas has figured, it only happens if Excel is started maximized.