Ok, it didn't complete the install then.
In the BIOS make sure the DVD/CD drive is the first boot device (f8 on startup to access the BIOS).
You will be prompted to press any key...do so when you see it
If it already formatted your drive, you can choose the unallocated space and start the install process.
If it already formatted your OS but the install didn't complete, and you have it booting from the hard drive, there isn't any OS for it to find. So you just need to do the install process and you should be good to go.