Mouse Problems

BEFORE YOU SAY IT IS COPIED, I READ THEM AND THEY WERE SOLVED, BUT IT HAS COME UP AGAIN. When i go on minecraft, on any single player server and multiplayer server and just the slightest movements on my mouse it just like a billion spins very fast in one very very little movement! And when I try to change the sensitivity on atchul pc it just doesn't work, plus you can't change it on minecraft.