When I press a specific key, a different symbol appears

Hello, I don't know how to solve the problem on my laptop. or I don't know if the problem is the keyboard or the laptop itself.
You see the keys "q, w, e, r, t, y" but the "u, i, o, p" won't work. Because if I press the key "u" the number 4 appears, when I press the key "i" number 5 appears, when I press key "o", number 6 appears and when I press the key "p" this "*" symbol appears. The keys "q, w, e, r, t, y, a, s, d, f, g, h, z, x, c, v, b, n" these keys work well but the keys next to them don't work, if you press those letters, numbers and symbols appear instead. I hope you can help me guys. I tried restarting my laptop, ACER Aspire 4750. Thanks in advance.