Corrupted and Unreadable windows

Up until last friday, my computer worked perfectly fine.
Then after i came back from school, i turned on the computer and it went straight to startup repair. I kept receiving messages that said
"The file or directory D:\Windows is corrupted and unreadable. Please run the chkdsk utility"

I let the startup repair work overnight but as i checked today morning, it was STILL going on. I then decided to use the chkdsk /f /r but it did not seem to help. I also tried to install windows again but it kept saying it was corrupted.

Currently, i believe that my hard drive is failing(which is sad because i just replaced a failing hard drive about half a year ago that came with this new comp)

Is there any way to fix this? Is it really a failing hard drive or is there something more sinister going on O_o?

BTW im using my old old old computer ^^

well the first hard drive that failed was one that came in the computer itself from the ibuypower company. After that failed, i replaced with a maxtor hard drive i believe and it just failed(possibly) now :/

well before i try all this stuff, do any of u guys possibly know wut is causing this problem?