I own a Lenovo z580 and recently, once or twice a day while I'm using the laptop it would give me the clicking of death and every possible process stops responding, I usually hard reset the computer and then the first time I boot it after that it doesn't recognise any hdd. One or two restarts and its running fine as new again. I ran windows error checking, crystaldiskinfo and also hd tune pro's diagnostics. Shows about 47 degrees under full load and good condition on the hdd, it also didn't find any bad sectors, runs at about 80-90 mb/s read speed ( The hdd is 5400 rpm ). Could this be an os or bios related problem or the hdd is actually dying, despite the diagnostics showing no sign of that. I'm using Win 10 Enterprise.