If you havent fixed the driver problem with the sound card, download this drivers:http://220.127.116.11/downloads/downloa ... Down=false
Couse your sound card is a litle problematic, if you install wrong drivers.
Removing the wrong drivers will be a chalenging task if you've made a mistake.
Here are the latest drivers for your LAN and Graphics card:http://www.sis.com/download/
Although, the problems for your internet conesction can be coused by a number of reasons.
e.g. Firewall, disabled services that autocnofig the network, prtocols, clients and services that you have installed for your network e.c.t.
As first, check in the device manager to see if the LAN card has drivers installed and that they are functioning.