New user/IT-noob here.
I was watching this video on window's security
on file hiding ( http://www.metacafe.com/watch/379519/windows_xp_security_hacking_hiding_files_ads/ )
Googling around for info on this area, all I could found is results on its threat, otherwise profound explaination
of its origins. Could anyone explain to me of its origin and purpose in simple? Is this feature necessary in the first place?