From my brief research it appears that the router is blocking the encryption or authentication to the MSN update service so the service asks for authentication (username and password). I have not found out Why exactly, the solution is enter the username:admin and the password:password or disable/uninstall the weather desktop gadget. There have been other variations on the password no definitive on which one to use.
Edited by Sneakycyber, 22 December 2012 - 02:41 PM.
Systems and Network Engineer
Certified CompTia Network +, A +