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Best Disk Lock is a powerful utility which can completely hide hard disk partitions and CD-ROM drives on your PC, disable USB devices or set USB devices as read-only. You cannot find a hidden hard disk partition in any environment, which can ensure the security and confidentiality of your data on this partition. There are three levels to lock a disk: elementary lock, intermediate lock and advaned lock. The advanced-lock can completely hide hard disk partitions on your PC. In addition, Best Disk Lock can also lock a file and folder. To enhance and perfect this software, we have added several enhancements: set the security of your system and optimize computer system. Besides, it allows you to use tools that come with the system without extra command.