"Hi, help me with my knee pain, which I will proceed to not describe to you in any detail whatsoever."
So, after you google knee anatomy and look at all the pretty pictures you can tell us EXACTLY how / where your knees hurt.
In the meantime....
1) move your feet closer together - about 1-2" - they are supposed to be roughly hip-width. Turn your toes out more. More than comfortable.
2) Quit jamming the bar down your back like you have Schwarzenneggarian back muscle you have to fight against. Just put it right below the spine of the scapulae. If you don't know what the spine of the scapula is, or where it is, see SS:BBT and the aforementioned Google, along with the colorful and illuminating pictures that result.
3) Jam your knees out.
4) Tell us more about: Training progression, weight gain, how much you're eating (because you are a skinny little thing and need to eat more than three sandwiches - do you have a girlfriend you can send to the kitchen to make them for you?), what weight you started at (squatting), and what other activities you perform that may affect your knees / recovery / etc.