Hi all, i have a problem with my HDD 1 week ago i noticed that my system slows down sometimes but its not lasted long. But day by day that slow downs increased and yesterday it was horrible i can't even use my computer anymore. It has a %100 hard drive activity but nothing really uses the drive. So i formatted hard drive but nothing changed even when formatting i can see the red light that shows HDD activity is always on and so bright and format took so long. But today it get more slow and i waited at least 30 minutes Windows starting. And then today i deleted the disks again and formatting right not its been 40-60 minutes when i start formatting but its on %25. So its so slow and %100 activity even with no operating system. My hard drive is WD Caviar Black 500GB. Can someone help me?