Ok you have a high-speed internet connection and you want to share it with other computers in your house. First you will have to obtain a router for ease of setup and configuration I recommend Linksys BEFSR41 EtherFast Cable/DSL Router w/4-Port Switch for wired connections and Linksys Wireless-G 802.11g Broadband Wireless Router for wireless connections.

     

The manufacturer provides a fantastic program with the router to set up your network. If you follow the procedures that they outline then you should be up and running multiple computers online in no time. If you have difficulties connecting these then you can call your internet service provider or the Linksys help line or drop me a comment with your problem and I will do my best to walk you through the issue.
For local file and printer sharing then there are a few more steps to take. First you have to turn on file and printer sharing. This is accomplished by right clicking on the local area connection and placing a check mark in front of the file sharing line. Second you will need to set up a workgroup for your home network. To do this right click on the my computer icon and select the properties then select the computer name tab. Click the change button on the page, Make sure that you have a name in the computer name and add a name to the workgroup name other than MSHOME like INMYHOUSE . Click ok to allow your computer to restart. Follow the same procedures on the other computer. Once both computers are restarted then open my computer and right click on the drive or folder that you want to share and select sharing and security. Select a name for your share or leave the default there and click apply. You will need to use this procedure on both computers if you want to have access to both computers from either computer. To share a printer then open the control panel and click on printers right click on the printer that you want to share and then select sharing and security. Select a name for your share or leave the default there and click apply. You should now be able to access the information from either computer by clicking on my network places.