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and type a memorable passkey that is at least 64 characters.  It's a hassle, but you only have type it a few times.
Plug your router into your internet socket if you want to share your internet. Plug your router into your PC with an ethernet cable. Go to your browser and type in the address "http://192.168.0.1 192.168.0.1" or "http://192.168.2.1 192.168.2.1", or "http://192.168.1.1 192.168.1.1". Enter your user name and password from your router (often "admin" and "admin") then your internet service provider. Enable wireless and set your encryption (WPA as a minimum, WEP can be cracked in seconds) use AES encryption if you have it available, skip if you do not.