When my pc stops responding my hard drive is at 100% usage, it becomes impossible to play online games and even browsing. While im writing this my browser stopped responding 3 times. My pc is good, i checked the rams they are working fine. It's an i5 6500, 8GB DDR4 2400MHz and a GTX 960. I already used both CCleaner and Malwarebytes. It is an old hard drive, but its a 3,5" Toshiba 7200RPM.