All this started few days back when my computer shows the error message disk boot failure and does not allow windows loading. I am not able to load winxp cuz . Loading of this gives blue screen of death or it get freeze while loading.Your screen does not show anything else than freezed screen. When I checked BIOS it recognizes all four drivers. I guess bad HDD can cause such error but at least RAID array should boot. So can anybody provide me with proper solution?