A storm knocked out our ethernet in the main desktop computer, though the
wireless still worked.  Everything is back up and running now, except when I
originally set up the wireless, I secured it.  And somehow, that setting has
changed and now my network is unsecure, and I can't figure out how to make it
secure again.

Danielle wrote:

Presumably you've got your wired portion of the network on again.
Connect one of the machines to the router via ethernet. Enter the
router's IP address into a browser addressbar. If the router was set
back to factory condition, enter the default user/password. Otherwise
enter the one you used to set it up. Go to the wireless settings and
enter your desired security settings. Refer to the router manual for
details.

Wireless - Basic Configuration -
http://www.ezlan.net/Wireless_Config.html
Wireless - Basic Security -  http://www.ezlan.net/Wireless_Security.html
Tom's Hardware Wireless Security FAQs
http://www.tomsnetworking.com/2006/06/30/wireless_faq_security/index.html

Malke

Let Windows manage neteork
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sharing printers
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Signal Strength
Internet Gateway Speed
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Enable Bluetooth detection
wireless networking
Wireless often disconnected and need system sleep/wake up