I need help to solve a big trouble. My "back-up" PC (P4 1.6, Asus P4SDX, 01 HD ATA-133 120 GB Maxtor & 01 HD ATA-100 40 GB Seagate) is having a boot problem since this morning... The message is "DISK BOOT FAILURE-INSERT DISK SYSTEM...". So, I put my MoBo CD in my drive of DVD and I could access DOS (only drive "A" - the program "called" my drive of DVD - normally named D by Windows - as drive "A")), but I can not reach my 02 hard drives (as if they were "missing"...). Inside BIOS, within BOOT menu, I can not set Primary Master and Slave, because they "disappeared" (appears only NONE inside this option... - as if I do not had any HDD...) Very strange, as I didn't change any setting of my PC. Well, I need a technical help to solve this odd problem; what can I do to make my PC to recognize my 02 HD's, please?? Thanks a lot in advance for any help!!!!