How to fix this toshiba laptop keyboard problem_?

I have a problem on my Toshiba Laptop Keyboard that just came up a while ago.

When i press the 1 key, it'll type 1z. when 2 key = 2\.

when i press my up arrow = letter u.




one more thing is when i hold the 1 key, it goes like this 1zzzzzzzzzz.. and so on.




i need help here! Im using toshiba

What about buying a new Laptop Keyboard such as Acer Laptop Keyboard or Compaq Laptop Keyboard?