@Crandon
I've had this problem and I've found a work around. You'll need a flash drive (16GB for games) then you just put whatever you want on it. My school blocked it really quick so I just unplugged the Ethernet cord in the back and it works. I wouldn't advise downloading illegal content at school, seems a bit risky. As for steam, make sure you are in offline mode with steam guard disabled otherwise it'll act up.