I've got an older HDD (probably 6-7ish years) that has basically crashed it seems like to me. I haven't had much experience with hard drives failing, but it just seems to me that is exactly what this one is doing. I can't get windows to boot from this drive. It has Windows 7 installed. I don't know what actually happened when the problem first occurred as it was brought to me afterwards and very little details were exchanged. I was told it was something along the lines of a BSOD then just wouldn't boot afterwards. When attempting startup repair or system restore to a date that it was definitely working on, errors occur and the process won't complete. I have it in another machine as storage, with another drive running the OS and it seems the drive is completely accessible. I'm not sure if that means anything, just trying to provide details.