a small part of my screen borders are now black

[solemn bear]

That's normal

[rugged pumice]

really

but it first legit fit perfectly

[solemn bear]

Yes that's part of the screen

[rugged pumice]

I didnt understand you

[rugged pumice]

so it is now part of it or

@solemn bear

[hasty ridge]

What is the exact make and model of monitor, and how is it connected to your PC? (Directly to GPU? Using what cable?)

[rugged pumice]

Directly to gpu using a 8d cable

[rugged pumice]

And it is the AOC Q27G2S QHD IPS 165 Hz 27 Inch

[hasty ridge]

@rugged pumice what Walt said here - the monitor naturally has a small ish 0.5cm (ish) bezel around the outer edge. https://aoc.com/us/gaming/products/monitors/q27g2s/gallery

[solemn bear]

[slender raven]

Youre trippin theres no issue here

[rugged pumice]

I legit never noticed how can I prevent my mouse to not get lost in the bezel?

[hasty ridge]

What do you mean getting lost? The point of your mouse doesn't go into the bezel. The mouse trail / end can go off screen because it's technically not where the pointer is - this is how Windows has worked for years.

[rugged pumice]

aah alright

[hasty ridge]

That said, if you want a neat utility (contained within a big set of utilities) that will show where your mouse is when you press CTRL twice, tada! https://learn.microsoft.com/en-us/windows/powertoys/mouse-utilities