/NoSecurity...

How would one disable security on a drive? convert /NoSecurity does this when converting a drive to NTFS, but on a drive that is already formatted with NTFS, is it possible to disable security without risking data loss?

(I'm on a comp with only Guest permissions right now, so I can't try anything)

edit: after further thought, I realize this is probably quite easily done without convert, and done through a Windows utility, but I still don't know to do it.