Alright. I made you a little something somethin because it's so old, it needed it. Download this link
and extract it to a folder.
Then, right click on the audio device in the device manager.
software. Browse my computer. Let me pick. Have disk. Browse.
Now navigate to wdma_emu.inf in the extracted folder
and double click on it. Click ok. Click next and let it install.
You can then right click the speaker icon in the system tray near the clock and go to playback devices to set it as you want. You can right click on any shown and then set it to show disconnected and disabled devices, too.