Yesterday i turn pc on and i went in to another room. After hours i came back and pc crashed so i tried to turn it off but i can't so i restarted it, but my windows won't start. So i plugged another one (60GB) with windows and it started. Previous 1tb hdd had 2 partitions one with windows 100gb and another with games 900gb, but i couldn't open this with windows i tried to format it but i got error that format couldn't be completed. I tried everything from chkdsk, diskpart, manage i couldn't fomat. Second partition was working fine i could open it and there was no problem. After restarting PC second partition crashed too, i tried again formating etc. Today when i turned my pc on 2 partitions disappeared, so i went in to disk management and it shows 931.51 gb unallocated space. When i try to initalize it Cyclic redundancy check error comes in. I'm very worried about that becouse i bought this hdd 4 months ago it still have warranty. Sory for my language but i try my best.