Booting error

This afternoon i turn on my pc but when i insert cd, suddenly it turns off. Then i turn it on again, but can't start windows and appeared netware bla bla bla v 3.1 . Press (home) key to choose local disk. When i did it appeared realtek bla bla bla the cable may be disconnected. I checked there was nothing wrong with the cable. I used no more floppy and don't have win xp cd. Help me guys.