And set the wifi to 802.11g for reasons I don't need to duplicate here. But try that. My hp c4780 wifi printer was the reason for that change.
I use a Dell Inspirion 2200 running XP to connect to the internet via wireless connection. I also use an HP-112y running to W7 to connect via wired connection. Both connect through a Netgear WRN2000v2 router. I have been using this configuration for several weeks. I also use a Officejet 6500 printer via wireless connection to print from both PCs.
During a recent power outage my connectivity did not return. All components were shutdown and restarted in the proper sequence. But I still could not connect wirelessly. My Dell laptop could see the network, but not connect. I checked the printer and it could not connect either. So I focused on the router. All configuration settings on the router seem to be in order. I tried repairing the connections on the Dell laptop and no problems with the computer could be found. To simplify matters I changed the router to an open connection, shutdown and restarted everything, and I still couldn't connect.
My HP desktop also has a wireless card. So I disabled the LAN connection. Made sure I could not get online with both the LAN connection and the wireless connection disabled. I could not. So I enabled the wireless card on the HP desktop and was able to connect.
Bottom line: I have 2 wireless devices that can see my open network, but can not connect. I also have a desktop PC that can connect. All configuration settings have been checked and none that I know of have been changed since the last time I connected (except for the router security as mentioned above).
Any suggestions? Thanks.