I have a home wireless network and forgot my security key (same as WEP?) My computer will still connect to the network, but I want to set up additional computers. Using the computer that is already set up and connected, can I somehow figure out what the security key is? Some detailed instruction would be helpful.

Sometimes the router admin screen for the wireless encryption setup will display the passkey you entered. Stupid thing for them to do, but some do it.

Otherwise, the easiest thing is to log back onto the admin screen of your router and set it to something else. Just make sure you KNOW what it is this time, because as soon as you re-set it, your existing computer will lose its connection and you will need to re-establish using the new key.

That's why it is best to do this kind of thing from a wired connection, in case you screw it up, the wired connection will always work.

If you do mess up and then can't connect to anything, you'll need to do a hard reset on your router to take it back to factory settings.