Take a pic that's 50 by 50 pixels and save it to your computer as a "BMP' instead of 'jpeg'. Then go to your profile and hover your arrow over the gray little smiley face. Click it. Then on the top, there's a little box that says "Change your Avatar". Click it. Then you'll want to browse for your picture on your computer. Easy enough. Then after selecting which one you want, click it. Then click ok. Lastly, before leaving that page scroll down to the bottom of the screen and click "OK". That should change your avatar pic.