How to change Aspect Ratio in Windows 10

[Versydon]

So i just turned on my PC today and to my surprise it has changed me from 16:9 to 4:3 ratios.

Ive tried getting Microsoft to fix it for me via remote they just worsened it. I dont know what to do

 

[smorizio]

if you have a nvidia or amd gpu the setting under there video driver control panel.