The issue is that when opening an Excel file, it shows as blank (as if no data or cells are being drawn). You can click into the worksheet space, and see that the data is showing in the formula bar, so the data is certainly there, it is just as if it is not being drawn. Un-maximizing the window then will draw the data, you can then maximize or snap the window and the data remains showing. Likewise, if hide the formula bar, the data shows, then can show the formula bar and it remains. If save the file, whether it has been edited or not, that particular file is then "fixed" and will reopen from that location fine.  The issue happens when opening files saved to desktop, user folders (local or network), or from Outlook attachment. 

This began with one system in several that was upgraded from Office 2013 ProPlus to Office 365 ProPlus. Office 2013 was removed with the Office 2013 C2R removal tool, prior to installing 365. Office 365 was applied after restart and is currently version 15.0.4745.1000. 

Changing the option for Run: Normal/Maximized/Minimized window on the shortcut does not appear to affect any change on the window opening maximized/fully snapped. Changing window size of Excel, then closing does not save the open state of the window. Disabled 2nd monitor to verify that it was not opening in some strange location on the 2nd monitor. 

If there is something that I'm missing in my searches for a fix, please help me out. I would appreciate a pointer to a patch for this issue if it exists. A registry setting/hack to force the window to open in different maximize/non-full screen modes for testing would even be helpful.

EDIT: 
I tried enabling Ignore other applications that use Dynamic Data Exchange (DDE), no change. Selecting all via CTRL+A and removing formatting does not help. Changing fonts does not help. I verified no repeat fonts are installed. Used Quick Repair and Online Repair options in Programs and Features to attempt to correct, but no change. 

• Edited by belrager Friday, August 28, 2015 4:02 PM Added more troubleshooting already completed.

This setting did not have any effect on the issue. Any other ideas?