updating the firmware on the router.
Use WPA security
Also are you using a cordless phone?
2.4 gh cordless phones interfere with the wireless routers, they use the same frequency.
I installed a Buffalo Technology WHR-G125 Wireless Router for my home wireless internet connection. I have my Laptop (Dell E1505 / Dell Wireless 1390 802.11g mini card) and Desktop (Dell XPS Gen4 / WLI2-PCI-G54S Wireless Network Adapter), sharing the same connection.
There are times in which the connection works fine for both computers. However, there are some times in which the connection just comes and goes. When I go to look for my wireless network in XP?s ?available wireless networks?, mine doesn?t show, and it has been gone for more than 15-20 minutes, then it will come back without rebooting the modem, nor the router, nor the PC. The problem occurs on both computers so I have discarded problems with both wireless adapters on the computers.
I have been using WPA security. I think the broadcast is using SSID, although I am not sure.
Has anyone run into the same kind of trouble? Might it be the router? Would a router change fix the problem? What can be the cause of this problem, and what may fix it?