How to turn off these phantom borders?

[RobertSF]

Out of the blue, Excel 2016 has started doing this.

When I typed 1.5 and hit Enter, the entire row got the top and bottom border. When I entered a number in E2 and then deleted it, the cell got a border all around.

These are phantom border. If you print-preview, they do not appear. They also do not appear under Format Cells, Borders. I'm wondering if this is some kind of accessibility feature that I inadvertently turned on. Has anyone seen anything like this?

 

[footoo]

https://support.microsoft.com/en-us...thesecurityupdateforexcel2016september12-2017

 

[RobertSF]

Fantastic. Thank you so much! I'll download that update. I noticed the updated also corrects "VBA code in Excel 2016 has worse performance than in Excel 2010." Definitely!