1.
Open Network Connections by clicking the Start button Picture of the Start button, clicking Control Panel, clicking Network and Internet, clicking Network and Sharing Center, and then clicking Manage network connections.
2.
Right-click the network adapter, and then do one of the following:
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To disable the network adapter, click Disable. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
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To enable the network adapter, click Enable. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
If you disable the adapter, you have to enable it again to connect to a network.