unity editor doesn't maintain the full hd

The problem is that i’ve bought a new laptop recently with the 1920x1080 resolution and have installed the unity 3d, but it doesn’t maintain this resolution. I mean not the scene itself, but the editor. I have a 5.4.2f2 version. Maybe i just haven’t install it correctly, or i need some additional stuff. P.S. maybe it’s a stupid question, but i couldn’t find any info about this issue (it’s annoying).Thanks!

Can you explain what you mean by the editor not being HD? The editor window dimensions?

yes! i’ve solved this problem by making a font in windows 100%(it was 125%,because everything was too small).So now it works well,but as I said the font is too hard to view. Maybe you can suggest another solving?