Cursor jumping to a different location in my Dell laptop

Hi all,

I own a Dell Inspiron 11 laptop and it is amazing. But recently I started facing one problem. While typing something in the notepad or MS Word, the cursor is going to a different place automatically. This is really frustrating while typing because I have to reposition the cursor in the correct place before start typing again and it is wasting time a lot. Does anybody experience this kind of problem before? Is this the problem with my keyboard, mouse or the laptop itself? Please help me to find a way to resolve this problem.

Thanks!