Lost wireless connection on my desktop - help

[pop3p]

Router: 2wire 1800HG Gateway, ATT/Yahoo DSL service.  PC=HPs7620n, generic wireless card adapter.  Laptop, Dell, Dell wireless card adapter.  
Lost connection on my PC this afternoon, now NOT Connected.  Called Tech support (ATT), went thorough the whole routine, no luck.  He transferred me to another Tech who told me that the problem is it is not asking for key and that I need to clear out the preferred network list and try to reconnect again.  He gave me Microsoft cust. srvc # but they are closed?  My laptop is still connected and still working fine.  I did change the name of my network this morning and was able to reconnect both PC+laptop but lost my PC connection this afternoon.  What is clearing out the preferred network list? Not asking for key (encrypted key)?  Help??

[pop3p]

Found the problem, I disabled the SSID and my PC would not pick this up.  It is supposed to only hide the name of the network but somehow if I enabled it, my PC would see it but no way of connecting to it.  I am using Windows XP media 2005.  Guess I will continue to have to broadcast my network name for my neighbor to see.

MP

[ale52]

I always change the default SSID to something peculiar.  Also set up security (WEP or WPA) and limit the number of computers that can access the router.

Alan <><