Spike nailed it - without a wireless nic in your desktop, it can't see wireless networks.
Putting in a wireless nic is easy and fairly cheap.
Also - Spike makes some good points. Always secure your wireless network. Sure, the security can be broken by someone who WANTS to - but your average joe in the neighborhood doesnt have the expertise, tools or time.
One often overlooked security feature is locking the network to only specific MAC addresses. This way, not only someone have to crack the security on your network, but they also have to try ALOT of combinations on the MAC to find the right one. Course, there are ways around that - but again - only the true intruders are going to know how.
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Good Hunting!
Captain Haplo
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