I just got a free imac from a store of the company i work for. When i start the imac up, it boots straight into wKiosk and and it says computer cannot connect to the internet. When i plug it straight into my router via ethernet it says the same thing. I am stuck on that screen and cannot click anything to get out of it. I tried booting the imac from a OS install disk. It said cannot install from disk please try from last backup. Computer cannot find any backups. Someone please help what else should i try.