have you added anything to your pc recently? such as blue tooth? what you want to do is isolate your blue tooth and wifi as much as possible....this is assuming you are using a wireless controller. I had the same issue with my ps4 controller via bluetooth, when i had the bluetooth dongle directly connected to the back of the pc, i would get the problem you are describing....i solved it by adding a 25ft extension usb cable and isolated the bluetooth dongle and it solved the problem. i realize this does not help you in your current (wired) situation....i would agree that maybe the dead zones on the sticks need to be calibrated....thats all the info i got.