Quote Originally Posted by Curio View Post
Download a program that will tell you what is accessing the disk like filemon from sysinternals or Disk Action from PCMag utilities, it will remove all doubt as to what is accessing the disk. Many softs annoyingly start scanning the disk for malware or indexing it's content when you would rather they didn't.
FILEMON
http://www.sysinternals.com/Utilities/Filemon.html

cannot locate a trial for disk action and it sounds pretty darn good

Egghead