I was looking into my dad's PC, which is old by the way, because the DVD drive disappeared from Windows, you can place a disc and it won't show anything. Anyway, I opened the PC and found out that the DVD drive isn't the only thing connected to IDE. Turns out there's also an old HDD that windows wasn't seeing either. Problem is that I don't remember what the jumper settings should be. Both drives were set as slave, but I have this odd feeling that the HDD should be set to master (or at least one of them should be set as master). As it should be obvious, Windows boots from the SATA HDD, so no issue on that part.
Thanks for any help that you can give me.