This has only started in the last few weeks, and only happens less than 20 % of the time, and not at any particular time of day.
HDD activity falls to near-nil for most of the time, then picks up again before finally turning off.
I'm afraid this will happen when my father, with whom I share this system, wants to use it, and wonders why I didn't just, say, put it in sleep mode.
HP CQ2014, Win7 Home Premium x64, faithfully updated. HDD about 20-25% capacity.
Edited by latimer141225, 26 December 2014 - 09:55 PM.