So I have this Toshiba 1tb hard drive in my parents pc, And it randomly wouldn't load, It had startup errors and couldn't repair itself, they said it has been very slow before this, so I assumed a hard drive failure, I booted it up in my PC and it didn't work either, PC detected it but couldn't load it. I ran the crystal disk program on it and no errors came up and the windows chkdsk error check I did and still nothing. I got the files off of it but I'm so confused why it won't boot if there's no errors?