1st what PC are you trying to install Windows on?
If you are certain that your 1st boot device is CD/DVD then perhaps your installation disk is at fault. If you have access to another PC capable of downloading and writing to a DVD you could create another disk, or even create a bootable USB device if your BIOS supports booting from USB.
hello and thanks for your prompt reply. pc is windows7 ultimate ,intel core i5 cpu 680 @3.60GHZ, 3.60GHz with 4gb ram, nvidea 250 gts card, gigabyte h55 motherboard and a 650 watt ps. I went into bios and made sure was set and saved to boot off cd. am trying to load/ copy new 2tb hdd. old one is too slow. i did install new hdd and ran 7 with 64 bit, but realised all my old hdd was 32 bit so reformatted hdd and started over, then this prob. Cheers N