How to fix game resolution not full screen?

Question

Windows

In the game counter strike source, if you set the resolution to 1024 * 768, the image becomes not full screen, but with black empty sides.
Laptop screen 1920*1080.
The problem appeared after on windows 10. On windows 7, the image was stretched around the edges.
Latest nvidia 650m graphics card driver.

Answer 1

It depends on the video card driver settings.

The problem appeared after on windows 10

The driver has changed.

Answer 2

Exactly. These are the default Intel graphics driver settings.
https://c2n.me/3S0ewgd.png

Answer 3

Scaling