I will assume that you have xp AND that you have the dvd on your secondary ide ? You may want to DL tweak ui , a free tool. If you have xp make sure you get the tweak ui for xp. Drives can be hidden and tweak ui will show you hidden drives. I seariously think that is not the case, i think it is something else, you should check first to make sure. You may also want to try safe mode and see if the drive appears.