When typing curser doesnt keep up with typing letters get jumbled

Hi im josh in cebu phils.friend may i help you? friend if the cursor doesn't appear, stops or keep on place when you are typing 3 problems are involved; first a virus is present in your document and it will affect the cursor. 2nd the mouse is damage or there maybe some dirt on it try to clean it especially when you are using ball mouse.or even optical you still clean the sides of the hole. and 3rd the connection on your pc is lossen try to check it.mount it properly. thats all friend good luck hope i helped you.