A lock-up clutch control method and apparatus controls a lock-up state of a torque converter interposed between a drive unit and a transmission on a vehicle. The apparatus and method utilize simultaneous electrostatic precipitation and membrane filtration of a particular pore size, wherein electrostatic collection and filtration occur on the same surface. Typically, the security policy and transaction elements are transmitted together; the security policy can be as little as a request to conduct the on-line business transaction. A virtual disk for a computing device comprises an image that includes: an Operating system for the computing device; one or more applications for a user of the computing device; a machine profile associated with the computing device; and user data and settings that are specific for the user of the computing device. Different policies applied to usage and the opening of ports based on both a collection of endpoints, managed regions, or on a per endpoint basis.