Keyboard deleting whole words instead of 1 letter

I've had this issue for about a year now. And it comes and goes.. I have a razer ornata chroma keyboard. And when i press backspace it deletes the whole word instead of just 1 letter. I've tried all i can do and research but ive come up with nothing. pressing ctrl or pause break or pressing them all together doesnt seem to fix or unstick the ctrl keys. ive tried reinstalling my keyboard drivers as well. when i go to my on screen keyboard and i press backspace i can see that it is also pressing down both ctrl keys with it. What can i do?