You will have to open up your network connections. Click start control panel network connections this may vary depending on your operating system look for local area connection if you see a red x or a yellow exclamation or question mark you will need to update or install the driver or it could be firewalled. Click start control panel administration tools computer management device manager look for network adapters + expand Ethernet driver if you see a yellow Question / Exclamation mark ? ! or a Red X you will need to update/reinstall the driver for the device You only need check the following if you cant install the driver Make sure you Ethernet/internet is enabled in bios.
Restart your computer during the boot up process you will see on your screen a certain key to press to enter set up (BIOS) press and hold that key to enter bios using arrow keys scroll to intergrated peripherals
look for SiS On Chip Pci Device press Enter make sure its enabled then recheck the driveri t should be there k the driver it should be there make sure its enabledPci device arrows key scroll to nstalled if you computer came with a motherboard disk the driver could be on it or this disk provided by your ISP provider Internet Service Provider or you might have to download one http://download.cnet.com/wireless-atheros-ar5b91-7/3000-2112_4-202570.html http://download.cnet.com/Realtek-RTL8139-Family-PCI-Fast-Ethernet-NIC/3000-2112_4-91313.html
if these packages are not the right http://download.cnet.com/2000-20_4.html
On the home page you should see a search tab just type in what you are looking for tick in the box for windows software or all software box IE: Motherboard name Wireless or Ethernet driver you might have to try a few times to get it right