/3/ - 3DCG

I'm new to using the blender program and I've found myself caught in quite the snag here. One day just out of the blue the standard materials screen changed from the default look to some sort of inconvenient and shitty mode to where I can't select any different shades other than to edit diffuse. I'm not sure why this happened because my older models load up the materials correctly but when I start to start something new the materials look like this. >pic

I think it may have been my brother when he changed my user preferences but I can't really tell or change it back to default, I even tried reinstalling the damn thing. Please help.