A water proof encasement for an electronic device, such as an electronic laser is used for DJ lighting, holiday lighting, video equipment, and the like. The reactor is formed from a combination of a magnetic T-core and a pair of magnetic L-cores. The hypervisor determines which virtual machines are using a particular machine memory page and may re-map the machine memory page to another available machine page, or may notify the virtual machines that the memory page has become or is becoming unavailable via a fault or other notification mechanism.