This does not sound like a hardware issue. More then likely it is a windows permission or cookies settings, or something with the way Minecraft/Mojang collects data from your computer. Have you tried contacting the Minecraft help desk or the community forums?
(note... I'm only speculating here as I do not play Minecraft)
dude you know nothing of computers - if your CPU wont work it freakin wouldn't do ANYTHING - it would only be a useless weight
so WHAT is your problem
and provide those things people asked from you
Your fps in that screenshot is 267 fps.. what is the complaint?
30 fps - there are several reasons possible for this..
1. you have programs running in the background that are eating up cycles
2. they're overclocked
3. You're not running the same power profile they are
4. They have better video cards...
Honestly, any fps over about 120 is a complete waste. I know folks claim to be able to see a difference between 144 hz and 120 hz.. but I doubt that. It doesnt mean they cannot tell the difference, but I'd wager the majority of them that can tell a 24 cycle increase in refresh rate are full of it .. especially if the game itself isn't running that fast. With proper pacing, 60 fps is smooth.. I think you're worrying about nothing
i see difference between 144hz and 240hz
but usually i am satisfied if i get +85 fps
and 267fps in MineCraft is all he needs - he should even enable Enhanced Sync - to lower input-lag
tested AOC Agon AG251FZ (240hz 1ms FreeSync) vs AOC G2460PF (144hz 1ms FreeSync)
i notice the difference
ps i still own the G2460PF (bought it 2 years ago) - but my next will be a 240hz screen