I recently installed OS 8.1 on a 4400/200. Everything looked ok till I rebooted the computer. The happy MAC appeared on the screen there was some HD access and after this nothing happened. No error message but the computer didn`t start to boot. So I tried to reinstall OS 8.1 I put the CD in and restarted the MAC. And what happpened. The Mac started booting from the HD becuase I forgot to press the C key at startup. I can work with OS 8.1 when the installation CD is in. (It must be the installation CD). What can I do to work with OS 8.1 without having the CD in.