Keyboard Controller Issue

Out of the blue my keyboard controller during play mode has gotten messed up. When I push the up down arrows the first person controller moves diagonally left and right. (The left and right arrows seem to be working just fine). I have used several different first person controllers from the Asset Store but they are all doing the same thing. Any ideas on why all of the different first person controllers would be doing this? Silly question, but could I be having a problem with my keyboard by any chance. Thanks for the help.

 

Go to the Edit dropdown and find "Edit -> Project Settings -> Input". There, you can find an array of specified "inputs", what they do, and how you activate them. I believe most controllers from the asset store use these inputs, so make sure yours are set correctly. I usually make my own controllers though, so I could be wrong.