Do you have files that are so important and meaningful? If yes, would you not want those files can be opened and viewed by friends or other people around you. The computer, which is not only used by your own. Many people save these files in a folder that is hidden (hidden). However, for those who understand computers, by changing the option in Windows Explorer, the folder must be found. Dangerous is not it?
For users of Windows 2000, the problems mentioned above can be overcome. But the hard disk must be formatted NTFS. In doing so, when logged on, you must apply as an administrator, while other people or your friends who use the same computer you have the settings as a user. When the computer is active with your logon, right click the folder that you want to set security, and select "Properties". On the tab "Security" click "Add", then you choose whoever the user is not allowed to access your folders. Click "add" to appear in the window below, and click "OK". Now you're back on the menu properties. Choose a username by clicking on it once and decide what can be done from the window of "permissions". Mark to all options "deny" that the user can not access all your folders. Then click "OK" to exit the properties.
Now when friends or others that you have set, logged on as himself, then he can not access your folders at will. Obviously this method will make your data stored safely.