Most of the time the culprit that causes your hard drive to work are anti-virus software, anti-spyware software, instant messenger programs (IM), and Microsoft’s own indexing service. It’s OK if a legitimate program is making your hard drive to work but you’ll never know if a hacker is doing a search on your hard drive looking for confidential stuff! Unfortunately, Microsoft didn’t include a tool to diagnose and check what program is secretly accessing your hard drive. The built-in Windows Task Manager doesn’t show you anything at all other than CPU and Memory Usage. So I am going to show you how to find out what process is busy reading and writing your hard drive when you’re not causing it.