For some time now, my Windows (7) PC has had a problem with excessive disk activity. Particularly on entering and resuming from Suspend/Sleep mode. The disk activity light is solidly on for quite a long time (sometimes 30 minutes or more), during which time my PC becomes extremely sluggish. Almost unresponsive with some apps. I've tried using Task Manager and Sysinternals ProcMon, but they take 5 minutes or more to load, and by the time they do, I see nothing suspicious. This problem is worst on enter/exit from Suspend mode, but occasionally it will occur in mid-session.