A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
I have a similar problem with Excel 2013 Pro Plus 64 bit running on Windows 10 Pro 64 bit, as well as another of my users running Excel 2016 Pro Plus 64 bit on Windows 10 Pro 64 bit
Display drivers are up to date, Office 2016 is up to date.
Offcat tool finds no errors.
We're both using Dell XPS 9530 laptops with D3100 USB Display Link docks, which have an issue with screen scaling when the dock is unplugged / plugged back in, so perhaps it is related to a scaling issue- when the laptop is removed from the dock, the scaling gets thrown off, and when the dock is re-attached, the scaling gets even worse, making some dialogue boxes enormous, and others so tiny the text is unreadable.
I've found that a reboot with the dock attached sometimes fixes the error with large black patches appearing through a document