What OS are you using? This computer should have come with a driver CD.. i'm assuming you're talking about the Hewlett Packard 443.. since there is no 443.se, perhaps you mean the 443.es, which uses an onboard AC97 compatible sound chip. If you don't have a cd, try emailing HP tech support.
We won't have much luck finding drivers for a computer that isn't even listed on HP's web site... the only models of the 443 that appear on the site are the .es, .nl, .fr, it, and .uk. Unless you have the CD that goes with your PC, then perhaps you are out of luck.