Open System in Control Panel.
On the Computer Name tab, click Change.
In Computer name, type your computer name.
The computer name must be unique. You cannot use a name already in use on the network.
In Workgroup, type the workgroup name.
To open System Properties, click Start, click Control Panel, click Performance and Maintenance, and then click System.
The Network Setup Wizard automatically configures your workgroup name.
The workgroup name must be the same on all the computers on the network.
Some Internet service providers (ISP) require a specific computer name. Check with your ISP before changing the computer name on your Internet Connection Sharing (ICS) host computer.