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Free App Lock is convenient security software to lock the apps in your computer to prevent others using them without your authorization. It can lock programs like IE, Firefox, Skype, Outlook, AOL, AIM, computer games and many others with a customized password. The program not only provides you with application privacy protection but also is integrated with two encryption modes for your choice: Speed priority mode and Security priority mode. You just pick the programs you want to encrypt, enter the password, confirm it and then encrypt.