I installed this on a computer I no longer have. I can't remember the user name & password. I understand that I can reset my router to default, but if I do that will it take the security key off too? I don't want my network unsecured. Or could someone tell me how to secure it again? I bought this a couple of years ago, and can't remember how it all set up. Sorry, but I am completely lost with this stuff! Thanks in advance for any help!