Probably the Windows indexing service. It's configured to run when you're not using your computer. You can turn it off and see if that stops the hard drive nois

Probably the Windows indexing service. It's configured to run when you're not using your computer. You can turn it off and see if that stops the hard drive noises: http://answers.microsoft.com/en-us/windows/forum/windows_7-files/disable-windows-search-indexer/914286d5-9485-49a9-a3df-f9516c9970cd http://answers.microsoft.com/en-us/windows/forum/windows_7-f...