Good day everyone. when I start my pc it nt loading windows it showing reboot and select proper boot device, so I decided to format and reinstall the same windows xp sp2, I changed boot sequence as 1st boot device to cdrom 2nd boot device to HDD and saved by presing f10 key then inserted windows xp cd into cdrom, it shows pres any key to boot from cd, I have not presd any key, it started to boot, it boots for sometime and then it shows pres enter to install windows,f3 to cancel setup, and other key (sorry I not remember) to repair windows. I presd enter to instal windows. As I pres enter it shows your hard disk is not detected check your hard disk is connected properly and it started to restart. Again I restarted and pres del button to view bios settings, when I pres del button, SATA-1 (ATAPI CD-ROM) is showing as detected and SATA-2 (HDD) as not detected. Then again I restarted pc, this time sata-1 and sata-2 both showing as detected, and I again started to boot from windows cd, when I insertd windows cd it shows pres any key to boot from cd. I have not presed any key and waited. It shows "disk error occured, pres ctrl+alt+del to restart" and sata-1 and sata-2 (specialy sata-2 hdd) showing sometimes detected and sometimes as not detected. Please anybody help me to solve this problem.