Error code lookup: http://www.nintendo.com/consumer/
Error Code: 52040
The Wii console is not able to connect to Nintendo Wi-Fi USB Connector.
1. Try uninstalling the Nintendo Wi-FI USB Connector software, and re-install. For step-by-step directions, including a link to the latest software, click here.
2. Does your PC have any security programs (firewall, anti-virus, anti-spyware, anti-adware, etc.) installed? If you are using the Nintendo Wi-Fi USB Connector, and have a software firewall or other computer security program installed on your computer, there may be additional steps you must complete to allow a successful connection.
If your firewall or PC security program keeps a list of trusted applications (also known as a "trusted zone"), the following programs are installed with the Nintendo Wi-Fi USB Connector, and require internet communications. If prompted by your firewall or PC security program, add these to the list of trusted applications. This information may also apply to certain computer security applications, such as anti-virus, anti-spyware, etc.:
o Nintendo Wi-Fi Connector USB (NintendoWFCReg.exe)
o Setup.exe (when installing the USB Connector)
3. It is possible that your Internet Service Provider (ISP) is not compatible with the Wii console. For instance, if you need to login with a user name and password when you try to go online for the first time after restrarting your PC, your ISP is likely not compatible. Please contact your service provider for more information.
If you are still receiving this error code, it is likely that the Nintendo Wi-Fi USB Connector is not compatible with your current home network.