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.Version 4.0 comes with proactive spyware defender, and is able to block installation of spyware and adware.