: Type dxdiag in the Start search and look under the Sound tab for the device name (e.g., Realtek, Creative, SoundMAX).

: Click Start , type device manager , and expand Sound, video and game controllers .

: If the device is listed as "Unknown," right-click it, go to Properties > Details , and select Hardware Ids from the dropdown. Copy the string (e.g., VEN_10EC&DEV_0887 ) into a search engine to find the exact model. 2. Common Windows 7 Audio Drivers