hello, not sure if i researched it right

Compaq Evo D510 Small Form Factor - Windows XP drivers

The HP drivers download page is here:
Compaq Evo D510 Small Form Factor*-* Download drivers and software - HP Business Support Center


Direct link to audio driver download is here:
http://h20000.www2.hp.com/bizsupport...tem=hd-17950-2