The resolution of your screen is how many dots your screen can display, horizontally and vertically. Never had this problem before and the resolution was just fine on Windows 10 until this happened.
This would be easy to fix if the Resolution options in the Display menu had 1920x1080, but they only go up to 1280x1024! Screen resolution statistics.

It is measured horizontally and vertically in pixels. How to Change Screen Resolution of a Display in Windows 10 The screen resolution of a display determines how much information is displayed on the screen. For example, if I say that my screen resolution is 1920 x 1080, this means that my monitor is showing 1920 pixels horizontally and 1080 pixels vertically. How to check the current screen resolution in Windows 10 Mobile, Tablet Simulator. In most circumstances, the best choice is 800 by 600 pixels or 1024 by 768 pixels, possibly higher if you're using a 19-inch or larger monitor. By the way, the 1920 x 1080 resolution is also known as 1080p. This is not determined by the size of the screen.

My screen resolution is an online tool which will show you the screen resolution of your device.

Common screen resolutions of rapidtables.com visitors (2/2014): My screen suddenly went from 1920x1080 to 1024x768 in the middle of running Windows 10. Some commentators also use display resolution to indicate a range of input formats that the display's input electronics will accept and often include formats greater than the screen's native grid size even though they have to be down-scaled to match the screen's parameters (e.g. Multi screen resolution Test- Test your website at different device resolutions i.e Mobile, Tablet, Desktop, Television.Check how your site looks on different devices. accepting a 1920 × 1080 input on a display with a native 1366 × 768 pixel array). Resolution 1024 x 768 implies the 1024 pixels is width and 768 pixels is height of the screen. The Screen resolution is usually determined as width x height in pixels. At lower screen resolutions, such as 640 x 480, fewer items will fit on the screen, but they will appear larger. If you have a 17” screen, it doesn’t necessarily have a greater screen resolution than a 13” screen. Use the drop-down menu or slider next to Resolution (XP calls it Screen Resolution) to pick a different resolution setting.