Try removing the cmos battery on the motherboard, then putting it back in about 5 minutes later, that should reset the motherboard to default settings, see if you can get it to boot back up.
Can you even get to the bios screen? If so you should be able to change the boot order from there, then when you setup windows, be sure when it reboots during setup, to catch it and reset it so the hdd is the main startup device again.
I will remove it. An try it again. It wpnt get to the bios at all. Thanks. Let I know later.