I tried EVERY driver on this site, as well as everything I could locate via the net. Nothing worked. I finally located this archived file from HP / Compaq. This is for the integrated sound chip on ENS/C600 SFF Compaq's. The SFF is small form factor, the EN is the model series, and the C600 is for the Celeron 600. Nothing else worked.....The upside is it installs without any problems, the downside is the file is 25 megabytes large. The file identifies itself as an ADI Soundmax. Try it.