Folder Security Personal allows you to hide and lock folders and files. You can choose to hide them completely or restrict access by making them read-only, preventing modification or deletion by other users or programs. It can restrict access to Floppy, CDRom, USB sticks, and other removable drives by locking them or making them read-only. It also includes a proactive spyware defender.
Version 4.1.312 adds Windows Vista support.