A child being immunized against polio. Immunization, or immunisation, is the process by which an individual's immune system becomes fortified against an agent (known as the immunogen). When this system is exposed to molecules that are foreign to the body, called non-self, it will orchestrate an immune response, and it will also develop the ability to quickly respond to a subsequent encounter because of immunological memory.
Windows Audio Device Graph Isolation is an audio file for recent versions of Windows that prevents other applications from modifying audio-related content and plug-ins. The application also serves as the audio engine for Windows.
Reinstalling Audio Drivers. 1  1. Open the Device Manager. The Device Manager is a Windows utility that allows you to see and manage all of your installed hardware. 2  2. Expand the Sound, video and game controllers category. Double-click your audio device. 3  3. Click the .Driver tab and click Update Driver.