Still can't get the o/s to install or installation cd to run. I went to the store where I bought the hd and the tech guy said the hd and wd installation cd were ok so he concluded that the dvd burner must be bad. I bought a new dvd burner and installed it, but it made no difference. I also installed new ide or ied whatever they're called cables and a new little dvd burner cable, but these made no difference either. I tried the dvd burner set as the master and hd set as the slave and at the neutral setting but this did not help either. I also tried the installations with the dvd burner and hd connected to separate ied cables. I will check all the connections again. The dvd drive is detected by the bios, and I am booting from the dvd burner. What else should I check?