How do i find my own security key for my wifi?

Your best bet is to reset the router and make a new password. You can usually do this with a small pin in a reset hole on the router.
 
Go to start-->Run

type: ipconfig /all
hit enter
write down your gateway/dns server, probably 192.168.1.1

Go into your web browser, type in the number.

Login - the login can vary
username: try- admin, administrator
Passwords: try- admin, password
If it is a Linksys, no username, password is admin

Go into wireless security settings, and there you go.
 
You'll have to reset the router if you changed the password. Once you do that following the suggestions from Kawinin.
 



Thanks Kevin. Ed G