Airport won't turn off

So I went to my in-laws house and for some reason I couldn't connect to their Airport/Router. I was on it once before and none of the settings were changed because I was on the router with my iPhone at that point. So I tried to turn off my Airport on my Mac just to see if that would work, and it won't turn off. I restarted my computer and nothing, still stays on. I turned off my Time Machine just to see if that was the issue and it wasn't. I will probably make an appointment with Apple and maybe call Applecare, but just wanted to see if anyone had any ideas here 1st.
I am now back at home and stuff can't turn it off. If it helps I am running Snow Leopard on my Mac.

Thanks

jmann said:

Repair your permissions then then reboot the computer and try again. See if that helps.

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That's under Disk utility? then I select Mac HD and select "Repair permissions"?

celticpride678 said:

First, try a PRAM reset.

Also, try deleting com.apple.airport.preferences.plist, NetworkInterfaces.plist, and preferences.plist form /Library/Preferences/SystemConfiguration and restart your computer.

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I followed that path and when I got to /Library/Preferences I didn't see a "SystemConfiguration"
Also what's a PRAM reset? sorry I am still learning things here.

EDIT: I found out how to do a PRAM reset and it didn't do anything.

celticpride678 said:

You need to make sure you go to Macintosh HD>Library>Preferences and find the folder. You went to your user-specific Library.

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Ok thanks, I found it. Now it does ask me for my pass code to delete them, is that normal?