I have pc with hard drive problem,tried every thing to get it back to normal...didnt work...so I took the hard drive and installed it in other pc ..I check the hard drive and was nothing wrong with it ,then installed new operating system in it(winXP sp2 pro)..it succeed, took it and installed to its original pc....the pc didnt agonize the hard drive...so I back to same problem..any help?.

get new connectors for the hard drive-motherboard connection maybe. when you say you tried everything what did you try? in your second pc as well, enter the bios and make sure under boot options that the hard drive option can see your hard drive. go to boot option, then go to hdd, hit enter instead of right or left. it should enter a menu that reads off the dark disk boot possibilities according to the disks you have installed. if the bios can't see you hard disk, i think it is a connection problem, like with ide cables or sata cable or whichever.

being that the drive boots fine from another pc, it sounds like it isn't the hard drive.