KEYKatcher Pro is currently in Beta release, and is the easiest way to ensure compliance with your school or company computer usage policy.  There is no software to install, and does not have to be configured for your network.  Even works on machines that are not connected to the network.

Just replace your current keyboard with the KEYKatcher Pro keyboard.   After you do, all keystrokes will be recorded inside of the keyboard itself.   The KEYKatcher Pro also contains a time/ date stamp on all activities, so you will know what occured, and when.  The time/ date function is backed up with it's own battery.  It will continue to keep time for about fifteen years, even when the computer is powered down, or when the keyboard is unplugged. 

In order to check a suspect student or employee activities, just access the device with your own administrative password, and review the log of what has been typed.  The 128K FLASH memory overwrites the oldest data, so it will never fill up, and you can always get access to what was done most recently.