I’m running Windows 7 and I see lots of activity when the machine is idle. How can I filter or view the tasks that are running when idle?
You can try this: open the task manager
(CTRL+ALT+DELETE -> Start Task Manager) or
(Right-click taskbar -> Start Task Manager), click the processes tab, if you have admin privileges then click Show processes from all users at the bottom, and then just wait a few minutes (for the pc to go idle) and see which process takes up more CPU.
Type resmon in the “search programs and files” box and hit enter, its better than task manager.
Use What’s my computer doing. It shows all programs (with details), that are accessing your hard disk or using the CPU. It’s freeware.