Hi I had a quick look at the laptop specs and it appears that the default screen resolution is

“Display
The window to applications, the Internet and more
Help me decide Choices:
15.6” High Definition HP LED Brightview (1366x768)
15.6" Full HD HP Anti-glare LED (1920 x 1080) "

Unless you have the upgraded HD screen 768 is the max vertical resolution, the 1024 is because the vanilla game is 4:3 format and not widescreen.

Some mods like SWWT have wide screen support but the screen can’t display anything better than the max native resolution.

Hope this helps