To bridge connections

You must be logged on as an administrator or a member of the Administrators group in order to complete this procedure. If your computer is connected to a network, network policy settings might also prevent you from completing this procedure.

Open Network Connections.
Under LAN or High-Speed Internet, hold down the CTRL key and select each of the private network connections that you want to be part of the bridge.
Right-click one of the highlighted private network connections, and then click Bridge Connections.
Notes

To open Network Connections, click Start, click Control Panel, click Network and Internet Connections, and then click Network Connections.
You must select at least two eligible network connections to create a bridge.
Only Ethernet, IEEE-1394 adapters, or Ethernet compatible adapters such as Wireless and home phoneline adapters (HPNA), can be part of the network bridge.
Adapters that have Internet Connection Sharing (ICS) enabled cannot be part of the network bridge and will not appear on the Network Bridge checklist. Similarly, the Add to Bridge option is available only for adapters that you can add as connections to Network Bridge.
Do not create a bridge between a public Internet connection and a private network connection, or add the public Internet connection to an existing network bridge. To do so will create an unprotected link between your network and the Internet, and your network could be vulnerable to intrusions.
You can create only one network bridge on a computer, but the bridge can accommodate any number of network connections.
You cannot create a bridge connection on a computer running Windows 2000 or earlier versions of Windows.
Network adapters that previously appeared under LAN or High-Speed Internet, appear under Network Bridge when they are added as connections. Network adapters that provide Internet connectivity, such as DSL and cable modems, cannot be bridged and will always appear under LAN or High-Speed Internet.