I am having network connection issues after getting a new router. There is one desktop and three laptops on the network. The desktop computer is connected using Ethernet and has no issues. The laptops use the wireless connection, and only one has a reliable connection.
The two laptops with connection issues run Windows XP Professional. One is a Toshiba Tecra M9 using an Intel 4965AGN wireless adapter. This computer can only rarely connect to the network. Windows always claims that it is connected and does not give the "limited or no connectivity" message, but I was told that Windows stated the computer never received an IP address from the router. When I first tried to use the new router, this computer would give a BSOD when connecting to the wireless network. Updating the driver for the wireless adapter fixed that, but I now have this problem. When the connection is lost, the connection can be successfully repaired by Windows.
The second laptop is a Toshiba Satellite 1000 using a Netgear WNA1100 wireless adapter. This computer randomly loses its connection (Windows gives the "limited or no connectivity" message), but the connection returns in a few minutes.
Also, the connection speed reported by Windows on all three computers suddenly dropped after an unauthorized computer somehow managed to connect to the wireless network. The network is secured using WPA2 and a strong password, so I can only assume that the WPS button on the router was accidentally pressed while someone else was trying to connect their computer to their own router using WPS. After this, the connection speed on the working laptop dropped to 72Mbps and the connection speed on the Toshiba Tecra laptop dropped to 54Mbps.
I did not have the old Toshiba Satellite laptop connected to the old router, but the other computers all worked perfectly with the old router. The old router was a Cisco Linksys E1200, and the new router is an Actiontec C1000A modem/router combo. The router was replaced because the old modem died and the new modem had a built-in router.
Yes, the WPS button on the Actiontec router is really that big.