Hello and welcome to Tom's Hardware Forums.

Go Start then Run in XP - or use the Windows key plus R in
Vista and Windows 7, then type in the following into the

Open box, including all the spaces:-

cmd /k ipconfig /all

then press Enter and from the black form that shows up, take

a note of the numeric code beside the Default Gateway icon -

something like 192.168.0.1.

Type exit to close the black form.

Open Internet Explorer and enter that code into the URL

address bar as though it was a website. You're then at the

login page to the router's settings utility and admin will

usually be the login with either admin or password as the

password but your router's instruction manual will help you

there.

If you're in, seek out Wireless and then Security and take a

note of the key. Sometimes it may be a passphrase, some a

simple set of letters and others a hexadecimal code. You

also may as well note which level of security it is - WEP,

WPA or WPA/PSK 2 and then either AES or TKIP. Your computer

will already know this but it's handy information to store.

Note also that hexadecimal only contains numbers from zero

to 9 and letters a to f so there's no confusion of I and O

with 1 and 0.

Keep a note of that security key in My Documents and also

outside the computer.

If you need more help after this thread is inexplicably closed down, feel free to PM me.