1. Assuming you're using safe wireless practices and using a WPA password to connect to the wireless network, try removing the network from the wireless network properties, then reconnect, typing the CORRECT password again.

2. Change the wireless channel on the router (Channel 6 is the default, try changing it to 1 or 11 and see if it helps.), making sure that you have the SSID (Public wireless network name) displaying correctly. (Don't hide it.)

3. Check the Linksys website for any updated firmware for the router and if found, download it and install it.

4. Make sure you're using 64 bit drivers for any wireless cards you have installed on the computer.

Hope this helps.