Abstract: A write blocking system may include a host computer. The host computer may include a host processor configured as a blocking driver. A separate connection interface device may be is configured to be operatively coupled to the host processor, and include a switch and a connection interface control device, such as a processor assembly. The switch may be connected to a storage drive. The connection interface control device may communicate with the blocking driver while the connection interface control device is operatively coupled to the host processor. The connection interface control device may selectively establish communication between the storage drive and the host processor by operating the switch after communication between the connection interface control device and the blocking driver. The blocking driver may filter commands from the host processor that are directed to the connected storage drive.

Abstract: A computer system for securing computer files from modification may include a processor; a first data storage area operatively coupled to the processor; a non-volatile second data storage area; and a control circuit. The second data storage area may be physically separate from the first data storage area. The second data storage area may store files that are executable by the processor, including executable files of an operating system configured to save temporary files on the at least a first data storage area. The control circuit may operatively couple the second data storage area to the processor, and may be operable in a first mode configured to block commands received from the processor and configured to modify the second data storage area from being communicated to the second data storage area. In a second mode, all commands may be allowed to the first and second data storage areas.