Browser Compatibility Problem

When I type my credentials into the login screen, the screen flashes and returns to the login screen again. Using Dell desktop with:

AMD (Radeon HD 8690A) and Intel (HD Graphics 4600) graphics cards with latest drivers
Windows 10 Home 10.0.105886
Chrome Version 53.0.2785.101 m (64-bit)

I know the credentials are correct, having successfully logged in using a chrome book.

Same negative results with IE (version 11.494.10586.0) as with Chrome.

But with Edge (25.10586.0.0), the login is successful with the “Whoa Cowboy” warning. I can then use the app as expected.

First thought it was the graphics cards, then the browsers, now with Edge success I am not sure.

Any thoughts?