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•You may have corrupted wireless profiles that cause WPA or 802.1X connections to fail,
•You may have corrupted wireless profiles that cause WEP or unencrypted connections to behave like WPA or 802.1X connections.
•You have deleted a driver, client, service, or protocol and cannot restore it.
•You are lost in the maze of networking issues and simply want to return to the default network settings.
As a trouble-shooting step, you may want to reinstall your network card drivers and configuration in order to fix corruption in its drivers or to return to the default network settings in Windows XP. Unfortunately, searching Windows Help does not give advice on how to do this.
The step-by-step help for this is found in the Help file for Device Manager.
1. Open Device Manager (Choose Start, Run, devmgmt.msc)
2. Make the following selections: Help, Help Topics, Device Manager, Uninstall and Reinstall Devices, Reinstall a Plug and Play device.
1. You normally do not need to physically remove the device.
2. As this is intended to reset your configuration to the defaults, any saved wireless profiles or other custom network settings will be lost.