Where do i find my network security key

[tonypowell]

Hello,
I just purchased an Acer Aspire One mini notebook and im trying to connect to the internet via the router in the house, but it keeps telling me i need the network security key. where do I find that security key information.

 

[HugoStiglitz]

often it is written on the underneath of the Router. or on a credit card sized piece included in the router's documentation