driver not detected

Hi


My pc was slow and freezed I manually restarted pc it didnt boot up at first after many restarts it booted up succesfully but it took while to login and pc was very slow after trying to install fresh copy of windows 7 there was no partitions detected after many tries partitions appeared but I couldn't install windows an error code 0x80070570 and after that I couldn't boot from hard drive it booted up from CD/DVD. I ran Seagate diagnostics tool at first it detected hard drive but didn't scan and after next try It didn't detect any hard drive.

When the drive is detected it gives me error (read disk error click CTRL+ALT+DEL) to restart after many restarts something called SLIC appeared it tried to boot but it failed every time.

I removed all cables and reconnected them again that didn't work
Controller is native IDE
I tried a faulty driver and ran windows 7 installation it detect the drives

I explained it what is the problem hard drive is not detected when i turn on pc it boots from CD/DVD and I can't install windows because partition doesn't show up in the installation.

Ok I explain again

My current hard drive can't be detected when booting because when I turn it my pc on it boots from CD/DVD, but in BIOS it shows that it is connected, when I triedto install windows it doesn't show any partitions. So I tried a different faulty hard drive to check the cables so it detected partitions of my (second hard drive that I dont use) in the windows installation so I knew it is not the cables that causing the problem but why it doesn't detect my other hard drive when booting or installing windows.

I want to know why my hard drive is not detected what is causing this problem and if I can fix this or should I buy new hard drive?