Lock and unlock your computer using USB flash drives as keys
...Features
• Automated USB lock and unlock function
• Lock file contents are encrypted
• Password to override lock (can be enabled by user)
• Network command to override lock (can enabled by user)
• USB drive serial number check (can be enabled by user)
• Unique key for each system (can be enabled by user)
• Status report function
Visit http://sourceforge.net/projects/nreg to view the new one. This is the update! It has better serial protection, more customizable options, and it has a better key maker! It has a ban and used key list system, and emails you when someone registers.