my computer froze while working, i pressed reset to restart the system, it said no boot device detected and showed no hard drive attached in bios menu, i have 2 hard drives, both sata. i changed around the cables primary and secondary and after an hour play around, the system started fine, i have no idea how, after half hour it froze again and nowits been a day since im changing cables tried a 3rd hard drive, reseted cmos, took out cmos cell, tried reinstall windows but i doesn't detect HDD so no use, it is a virus i suppose, please help i plugged in a 3rd hard disk which is working on my second pc, it too was not detected. it means its not a hard disk issue, hardisks are revolving, the boot led on mother boots lite up. i have tried even to change achi to ide in boot menu.. i even tried to reinstall windows with a bootable usb as dvd too is not being recognized. the usb files got corrupted on third restart. i have no idea what to do, do not say its hard drive failure as they worked fine after first error.