My wired router worked fine until March 5th, 2008.  I was unable to connect to the internet and received the following message: cannot communicate with primary DNS Server. I had my pc and xbox 360 connected.  I powere cycled, reset factory settings, and there was no firmware available for download (recommendations from Linksys Tech).  I still get the same message.  Any ideas regarding what could cause this?

 

Dell Inspirion 531

2 GB Memory

Athlon Duo Core Processor

Vista Business SP1

Linksys Etherfast Wired DSL/Cable router.  Model BEFSR41 ver.4.3