Abstract: A microphone or lens cover covers a microphone opening or the lens of a camera on a portable computer or mobile electronic device. The base of the cover is affixed to the electronic device, and the lid is movable to permit the microphone or lens to be exposed and used, or to be covered. The base holds the lid in place both when the lid is covering the microphone or lens, and when the lid is moved aside to permit the microphone or lens to be used. In either the open or closed position, the lid is held in place either by magnetic attraction, or self-adhesive vinyl, or by hook and loop fasteners, depending on the construction of the cover. The base of the cover is affixed to the electronic device by way of adhesive.