Not wireless network adapters(any help?)

I'm using an usb chord for internet right now. So heres the problem I downloaded a game called rf online yesterday more than likely it was a bad link cause a warning unknown publisher in red came up and i ignored anyway. So that messed up my comp and then my computer got bricked and my roommate had to reinstall everything on my computer, so then i reinstalled the game with a valid link this time no negative warnings and now i am not able to find wireless networks  in a university with wireless connection everywhere could someone help me please.