"Other computers cannot connect to the Net through this computer."

My Dell desktop computer and Gateway laptop are both using WIN XP. We have a wireless router installed correctly, apparently, and can access the Net through either computer. However, when I try to use the Network Wizard on my main computer (the desktop), I get:

Other computers cannot connect to the Net through this computer. In addition to its Internet connection, this computer must have a connection to your network.

I have no idea where to go from here. Can someone please help?

 

Happy to help if you say what you are trying to do. Have the two PCs share files or printers maybe?

Leave the network wizard alone for the time being (or maybe forever). Not needed.

But knowing which version of XP is needed since they do lots of things very differently.