Delete The Belkin Pin Code From Computer?

How can I remove the PIN code that's been configured in my computer. My computer shares in a home network that bumps everyone out whenever I go into the internet including the owner of the BELKIN network router to whom we are connected to the internet. I mistakenly connected into the network via the router's PIN Code resulting in my computer being configured and the rest of computers in the network being bumped out. Instead of just typing the passphrase/password I typed in the text box the PIN code for the Belkin router when it asked for the PIN code instead of just connecting into the internet without necessarily configuring my computer for the BELKIN router? how to remove the PIN code in my computer so that I do not bump everyone in the network.