please help. my computer crushed after running some anti-virus program. it could not go to safe mode. when i tried to boot, it shows the message "disk boot failture, insert system disk and press enter". i tried the windows xp recoverary disk (CD version), it goes to the blue screen, but when asking it to repair, it does not go to windows lisence agreement page. the Bios pages shows the primary master as "TSSTtcorpCD/DVDW SH-W", primary slave as "HL-DT-ST CD-ROM GCR", and none for secondary master and secondary slave. does it mean that the system does not recognize the harddrive at all?