It will scan all NTFS filesystems and return a list of all the matching files... very quickly!
Here is how the author describes it
"Everything" is an administrative tool that locates files and folders by filename instantly for Windows.
Unlike Windows search, "Everything" initially displays every file and folder on your computer (hence the name "Everything").
You type in a search filter to limit what files and folders are displayed.
ps: Comments and/or links to this article are most welcome!