ragdall wrote

"Anglogeezer,
Will they tell me how to "use an encrypted signal for security"?

I failed that aspect of configuring my own wireless router and only use it when absolutely necessary because I'm worried about the aforementioned 14 year old. Maybe I'll need to locate him and hire him to set it up?"
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I hope that instructions on encryption/security are bundled with the router, in the manual! otherwise call the product helpline if they have one.
Ivan B posted a link to some instructions which seem comprehensive.
Just take it steady. Scanning quickly thru the instructions it seems that setting up the encryption is just another step although you may select "DISABLE SECURITY" if you wish.

regards
Jake