A family of Microsoft word processing software products for creating web, email, and print documents.
I too had this issue with a laptop and external monitor - both Dell, but I also had it using an AOC monitor. Display OK if using the additional monitor to duplicate the laptop screen, but not if extending it, which as has already been said, rather defeats the point. Also had issues with Excel screen corruption and crashing as mentioned by others.
Running in safe mode I found no Add-ins enabled, but after going back to normal mode it seemed to have sorted itself... but only for a while. Trying various alternative screen refresh rates also gave no remedy.
Setting the text size to 125% does work for me however. Still not a perfect solution as menu bars are chunkier and take up more precious screen area, but better than the "duplicate" option, or the pages jiggling around in that nausea-inducing way, which also makes doing any precise placing with the mouse impossible.
Thanks.