I have a WDC WD4003FZEX-00Z4SA0 4TB black, 2 months old (OS is on another drive, SSD).
Something is consuming 100% of it`s usage, nothing I run is active.
It happens most of the time for long durations (minutes, hours).
](http://i61.tinypic.com/2pzza52.png[/img])
](http://i59.tinypic.com/jtma7o.png[/img])
](http://i62.tinypic.com/2h6rtb8.png[/img])
Win 8.1. is installed on another, SSD drive.
Another 1TB WD HDD is free of usage.
Core i7, 8GB Ram (2 sticks).
Appreciate your help.