Voila on a resolu le probleme apparement.
Okay. This problem ocurrs when installing the Nintendo Wi-Fi Usb Connector. When asked to insert the USB connector you would get an error message that says "Internet Connection Sharing Error." Here is what to do.
First, plug the USB connector into your computer.
Next insert the disk that came with the connector. Do not run the disk yet!
You need to go to the start menu on your computer and select ´run´. Select browse and go to the cd you just put in. Open the folder "NintendoWFCReg." Next, open the folder "SoftAP." After that, choose the file "DEVREMOVE.exe". So in the run box it should say E:\NintendoWFCReg\SoftAP\DEVREMOVE.exe. Go ahead and run it.
Next, a message box will appear containing a bunch of question marks. I´m not sure exactly what the options are but you want to choose the "yes", "okay", or "I agree" option. This leads to another similar message with question marks. Do the same thing you did with the last one.
Okay. Everything should be said and done as far as that goes.
Next, remove the USB connector and restart your computer.
Now, run the install disk. When prompted to, insert the USB connector and you should be set.
I seriously hope this helps someone. A nintendo rep just helped me with this problem and I hope I remembered all of the steps right. (Admins, please edit my post if I listed a step incorrectly.)