Where can I download an audio device for a windows XP computer?

I uninstalled my "audio device" on my computer by mistake. D: Now no sound can come out of my computer. I went on the control panel thing and the volume thing was all unclickable and greyed out, saying "no audio device". So I was wondering where I can re-download an audio device for a windows... show more I uninstalled my "audio device" on my computer by mistake. D: Now no sound can come out of my computer. I went on the control panel thing and the volume thing was all unclickable and greyed out, saying "no audio device".

So I was wondering where I can re-download an audio device for a windows computer. The one I had before was called high definition Audio Bus or something. Please help! I've been music-less for an entire day
Plz help me...
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