EXEsafe

EXEsafe allows you to put a lock on almost any program file, such as a game, or your office software. When the password protected program is run, it asks for the password - only users that know it will then be able to use the program.

It replaces the software icon with a padlock to indicate that the software has been locked. You can even set the time that it is locked at - for example, you could stop your children playing games while they should be doing their homework.