I can't tell if you went into the BIOS menu to change the boot order? If so, then that is strange it doesn't give you that option. How about from a USB stick? Can you boot from that? Is that an option? How old is the laptop? Most these days should allow booting from DVD or USB.
If you can boot from USB, then set up your installation to boot from USB.
This article tells you how -> http://technet.microsoft.com/en-us/magazine/dd535816.aspx