Originally Posted by camers
if you have xp your in luck..
right click the folder then sharing and security.
then tick make this folder private and apply then it'll ask if you want a password
And remember folks that this only applys for network file sharing.
On Linux you're in a bit of luck! If you are the root user then you can chmod a directory or file so only root can use that file. You can do the same even if you're not root so other users on the system can't see your files but you have to remember that root will be able to view your files no matter what.
Also if you are running Linux and don't want to issue commands to the terminal most window managers including the two most popular ones, Gnome and Kde, both allow you to chmod a file or directory from the file attributes menu.