I have a samsung laptop RF510. I was having problems with the keyboard. I replaced the keyboard.(a very interesting experience). However that did not fix the problem. When I type some of the right hand keys the cursor jumps back and starts typing in the middle of the previous word or just deletes everything. It is fairly random. I have a clean install of the OS 7. Any suggestion would be appreciated. I do not want to send it back since I am sure it is not worth the cost.