Possible Duplicates:
hard drive activity by program?
What is causing hard drive grinding?
Once or twice a day my computer starts writing significantly hard to the hard drive, the HD led is ON and the performance hit is noticeable. A strange observation is that the Task Viewer does not show I/O activity - even Process Explorer shows no CPU activity and no I/O bytes read or written.
Is there a way to know which application is using the hard drive and how much data is it reading or writing?