The error message says the wireless network security key is not correct. But it hasn't been changed in months and up until now, I'd been using the internet almost every day.

Our home PC connects to the internet fine. But we have two laptops on this network and as of last night, neither of them will connect to our Linksys.

Also, on the cable modem, the Send and Receive lights are both out.

Any suggestions?
THanks.

Try unplugging all your modem/routers for 30 seconds and then plug them back in. This usually fixes any issues I have with mine. Also, it's unlikely but your password may have gotten changed one way or another. Try logging into your modem (type 192.168.0.1 into your browser and it should connect and ask you to log in; although I don't know if this will work without a connection...) If all that fails you can always find the reset button on your modem and hold it down for...I don't remember, 30 seconds should be plenty. This'll reset you to your factory settings and you can then easily connect and set up your password again.