Multimedia Audio Controller, CODE 28: Windows XP, Pentium proccessor, A1-Open mother board, Sound Blaster 16 pci sound card. The first question involved the playing of DVDs, when DVDs are played no audio is present. The diagnostic presented a exclamation mark and question mark on the Multimedia audio controller, with error Code 28. I went so far as to remove the sound card from the machine with all software and drivers. I also removed the Multimedia audio controller from device manager. The result is the finding of new hardware(with sound card removed) Multimedia audio controller. When detected it attempts to find the driver, the driver is not found, and it is Code 28. What is the remedy?