Como bloquear pastas

[Danaides]

Boas

Temos um computador com varias pastas, e com algumas pessoais com fotos e videos, á algum programa que deia para fechar essas pastas com uma passaword, para os meus irmãos não terem acesso a essas pastas ?

[LuisFilipe]

To display the Security tab
Open Folder Options in Control Panel.
Click Start, and then click Control Panel.
Double-click Folder Options.
On the View tab, under Advanced settings, clear Use simple file sharing [Recommended].

To set, view, change, or remove file and folder permissions
Open Windows Explorer, and then locate the file or folder for which you want to set permissions.
Right-click the file or folder, click Properties, and then click the Security tab.
Do one of the following:
To set permissions for a group or user that does not appear in the Group or user names box, click Add. Type the name of the group or user you want to set permissions for and then click OK.
To change or remove permissions from an existing group or user, click the name of the group or user.
Do one of the following:
To allow or deny a permission, in the Permissions for User or Group box, select the Allow or Deny check box.
To remove the group or user from the Group or user names box, click Remove.

EDIT: Já aprendi qualquer coisa hoje