not booting

[kain666]

my computer trys to boot from the hard disk but i want it to boot from dvd. my keyboard is not working. the keyboard is ps2. the keyboard work on other machines. what should i do?

 

[kain666]

ok thanks guys i got a new keyboard which works but now when i boot the computer it says insert system disk and press enter. i have tryed both the motherboard drivers cd and the windows 7 install disk but none work. help.